No, that just means that they were either written by different writers who didn't consult each other or who wanted to present different options, or they were written specifically to override the previous rules, most likely because they were part of a different edition.
If the different writers didn't need to consult each other, and came up with opposite rules... doesn't that imply that it didn't really matter and that they were fairly interchangeable? There are even gods who were also specifically Demon Lords, like Thasmudyan from "The Complete Book of Necromancers" from 1995.
Can but don't, because D&D gods--outside of homebrewed individuals for individual worlds--don't do that sort of thing.
And again, my only concern with this portion of the discussion is whether or not they can. Because maybe someone homebrewed a god in a world that does that for a Celestial Warlock pact. No reason that they can't, so it is a story we can possibly tell.
Strangely, I can believe you didn't actually read what I wrote. Gods sometimes impersonate other gods for pretty much same reasons that humans impersonate other humans, and gods may even impersonate humans to walk among them or impart valuable gifts or lessons, but yes, it's out of character for one to impersonate another god just to get worshipers.
Okay, but that wasn't the original example, so maybe you should be more clear that you are altering the example. You are right, it doesn't make a lot of sense to impersonate another god to get worshipers, of course, you still absolutely could have a false face as a different diety to get worship if you happen to be an evil god of some terrible thing, not that hard to do I'd imagine.
That's fine. But since the gods may or may not even exist there, and the archfiends are, IIRC, all imprisoned, it's entirely a moot point. For all practical purposes, Eberron doesn't have gods, it has religions. Religions that, unlike in just about every other D&D setting, have no alignment restrictions and practically no boundaries on what can be done in the religions name. Which is why you have a "good" religion like the Silver Flame that tried to commit genocide.
1) It isn't a moot point. A setting where the gods are distant the archfiends imprisoned is still a setting with gods and archfiends.
2) Nothing you are saying changes anything about the fact that I am including settings like Eberron in the discussion of "things it is possible to do within DnD" since it is a setting in DnD.
3) Um... yeah, so you realize that Helm has a genocide in Matizca right? I'm sure if we dug through the various settings with a fine toothed comb we'd find plenty of "good" beings that committed terrible acts. Dragonlance anyone? Eberron just made it a bit more explicit.
If your sole reason is to say "don't pick both without good reason, because you don't have to feel obligated to include everything" then why do you continue to argue this? Why do you continue to claim that evil gods and archfiends are all but identical and redundant? Why do you continue to dismiss every idea offered you with "no, because they're redundant"? Why do you continue to move goalposts? Why not accept that DMs who aren't you in fact do tell different stories with archfiends and evil gods, or accept that DMs would roleplay them in different ways? Even if Bane and Asmodeus had completely identical portfolios, they're still different people who would go about their goals in different ways.
If your only reason for arguing in this thread is truly to say "don't pick both without good reason, because you don't have to feel obligated to include everything," then why do you care if other people argue otherwise? You would have offered your advice. After advice is offered, it's up to other people as to whether or not they take it. You're not required to continue to beat it into other people's heads until they accept it.
And most importantly, you haven't shown why it's bad to have redundant gods and archthings! There are stories that can be told of two practically-identical entities vying for the same thing.
I have no reason to show that it is bad. I have talked about how it can end up creating a muddled and confused story, which in my mind is fairly bad, but I don't need to prove it is bad, because I don't care if people think it is good or bad. I simply am pointing out that it is.
Why do I care that people are saying "No, you are wrong, this is the truth"? Well, because I don't think I'm wrong. Is it so strange that I'm responding to people who have a different perspective by trying to convince them of my side? Isn't that the point of discussing? I don't believe in just making a statement then abandoning the field. I defend my ideas.
As for the first part, why am I responding to your answers with the fact that they are redundant? Because you claimed you could tell a story with evil gods that was impossible to tell with Archfiends. So, if your evidence doesn't prove that, then I'm going to tell you that it doesn't. Why can't I accept people enforcing differences they made up? Because you are presenting those not as "here is something you could potentially do" but as "You are wrong that they are redundant, because I made up a reason that they aren't redundant" which doesn't make me wrong, it makes you having made-up facts that did not otherwise exist.
No, you've just been telling people that there's no stories that can be told that differentiate them. That's pretty much the same thing.
You don't "need" to have both elves and dwarfs. Sure, one lives "in nature" and the other lives "underground"... in D&D (and that's excluding the drow--or all those dwarfs that live above ground, like those albino dwarfs from Chult). But mythology has elves living underground as well (dokkalfar--which may actually be dwarfs), and quite frankly caverns are just as natural as forests are, and can be just as beautiful--and I'm talking about real caverns here, not fantasy caverns that have a full ecosystem. And at least one popular depiction of dwarfs shows them living in a forest, in small groups of seven. Those guys just commuted to the Underdark for work.
But even if you go the standard route and differentiate the two like D&D does (which I would do), you still don't "need" them both. You don't need either of them. You can easily have a world with no Tolkienesque races in it, especially considering the number of anthro races out there. Most people include elves and dwarfs because they want to.
And yet there are clearly stories that are tied to one and not the other. Elves are not known for many of the same things Dwarves are. In most depictions of them they are incredibly different beings.
If you wanted to say that elves and dwarves are nearly indistinguishable from each other, I'd be interested in seeing your arguments, but just the fact that caves are natural and beautiful doesn't make them the same as living in a forest. And Elves are not really seen in the clan structures that dwarves have, which is a major driver of some dwarven stories.
Except that Ghaunadaurs isn't just the god of oozes. He's the god of oozes AND abominations AND outcasts AND caverns AND subterranean things AND possibly some part of Elemental Evil. You're choosing to actively ignore all the things that make Ghaunadaur different from Juiblex in favor of the one thing they have in common (and moving those goalposts by saying "what if he's not part of the drow pantheon" when there's no reason for him to ditch part of his portfolio). It's like saying Talos and Umberlee are redundant because they're both the god of storms while ignoring all the rest of their portfolios.
So, ignoring my change of the argument to try and avoid confusion to continue pounding on the point of confusion. Would you be happy if I said I must have obviously picked a bad example then? Because, actually, I do think that Talos and Umberlee both being in charge of all storms is redundant. Why do they both need that portfolio?
Does that mean that the character's are identical? No, but it does indicate that their jobs are redundant.
Let's see the statblock for Ghaunadaur to see if he has the same powers as Juiblex. Have one handy? I'm sure at least one edition had stats for him. It sounds like something 1e or 2e would do.
The "control all oozes everywhere" part. But hey, I literally changed the example because you hated the original example so much, so maybe instead of trying to compare the statblocks, we could focus on the changed example, since I made the mistake of trying to use real dnd lore for my example.
The only reason you see those plots as interchangeable is because you're coming into the argument assuming that the gods and fiends are interchangeable and dismissing everyone who feels otherwise. You have shown repeatedly that you are willing to have gods act like fiends and fiends act like gods. And while that may be fine for your campaign, it's not the way that the game itself is written, or the way that the rest of us this thread are using them.
Then how do you run Yeenoghu? You claim you run him differently than me, and I run him how the books say to, so how do you run him?
Unless, like the many of us, you use some of the canonical rules and/or make up our own rules to differentiate them. Like gods can create clerics and archfiends can either create few clerics or can only create warlocks.
But you kept dismissing those rules. This is why I doubt that you're just trying to tell people that they're redundant so they don't feel obligated to have both. You have actively gone out of your way to scrounge up obscure rules in order to tell people that the ways they differentiate gods and archthings is wrong or has been overruled in a different source.
If you really want to show people that they're redundant, then I would think that your goal would be to help remove those redundancies, even if it means completely homebrewing differences. But you haven't.
How would removing redundancies show people that they are redundant? Doesn't that seem counter-intuitive?
And, yes, "only gods can create clerics" is something that is not true. You can make it true for your world if you want, but that doesn't make it a true fact of the game.