(Chunk, how do we keep moving nearly 10 pages a day?)
You'd most likely win that bet.
However - and this is my point - that it has never happened doesn't mean that it could never happen. It could happen on Jan 13 when the NHL starts up: a referee might pick some random schlub from the crowd (assuming fans are allowed!) and toss him out of the rink and, though morally in the wrong, would be completely within his rights and purview to do so.
Why then would you want to claim an authority which to use is morally wrong?
That a DM could do something morally wrong is not a good thing, but you seem to want to defend the right they have to exercise just that authority.
While I can't say I'd never do this, I've yet to do it and it'd have to be an extremely unusual situation to make it happen.
A non-player who's stopped by to sit in on the game? Sure - here, do some rolling for me.

But players only track and roll for things that are on their side: the PCs, their henches, things the PCs have summoned or charmed, and so forth.
That
you would do so is rather beside the point that
other people have done so.
And since they have, and it worked, then it logical to then put forth that a DM is not strictly neccessary to run the monsters. Because, sometimes, people let the Players run the monsters.
We're not going to agree on this one, I can see it now.
Why is saying the game belongs to the entire group a deal breaker for you?
DM-less D&D is possible but would almost certainly be a completely different experience for all involved; and while fun to try once I can't imagine anyone lining up to try it twice.
You could turn adventure or dungeon generation over to some sort of randomizer - but then someone (or everyone) would have to keep careful records of what the randomizer pushed out to provide consistency should the party return there later.
You could turn opposition generation (a.k.a. spawning) over to a randomizer but someone - or everyone, taking turns - would still have to run the opposition as well as their own PC(s).
The one thing you probably couldn't randomize would be setting generation, unless you wanted to end up with something that'd almost certainly be geographically impossible.
"I can't see people liking it, therefore it is impossible for people to like" seems like an incredibly weak argument.
Yes, yes, and almost-yes. The characters are the property of their players.
Considering we just proved that you can run DnD without a DM, something you flat out admitted was possible, then how can you turn around and say that "yes, you cannot run DnD without a DM"
I mean, I can't tell you what to to think, but refusing to acknowledge your own admission and stating that you are the most important person at the table? That seems like a very tenous position to have.
And again, every one of those provides a considerably different experience than playing an organized, refereed game in the same sport. Unlike DM-less D&D, however, that experience can still be fun for all involved.
Um... first off, you can't claim that it isn't fun for them. You literally have nothing to base that on except the fact that you can't imagine it would be fun.
Secondly, "a different experience" is not "a different game"
Yeah, an NFL player has a different experience than the guys playing football in the park, but they are still playing the same game to a large degree.
I think you see session 0 as being something different than I do.
To me session 0 is roll-up night, where dice hit the table and characters are made. Enough setting prep etc. is already in the can to provide a backdrop for getting started and then some. Everyone there has accepted the invite to play and has already been told of any restrictions (I call this phase session -1) probably in one-on-one communication in whatever setting or manner works at the time.
The having of a campaign idea (which in my case means constructing a whole new setting from scratch) happens months if not years before any of this.
So the players need to know every houserule, every public knowledge detail and all of that months before the game?
No, that is when you start making things, but that isn't when the players are informed of them.
I guess if you do a whole bunch of pre-session zero talking, that is when these things might come up, but seeing "the dice hit the table" and realizing you probably have everyone roll their stats... a player might roll stats that inspires them to play a paladin during session 0. Being a paladin they would want to be part of a holy order.
Do you honestly restrict them to a specific and limited group of potential holy orders, with no input from them at all?
In this particular example, if the Tiefling's intentionally a once-only thing then I'd probably let Karl play one, though reluctantly: it'd be the same for bookkeeping purposes as if Jerry's PC somehow got permanently polymorphed into one. If Tieflings are to be introduced as a full new PC-playable creature, however, that's in fact a lot of work for me-as-DM behind the scenes to update my rules etc. to factor in this new race (my rule-set is almost entirely homebrew these days) which I might not be keen on doing; even less so as I personally don't like Tieflings in the slightest. In this case Karl and the others would probably be out of luck.
Which again, I don't get. I don't see the value in overriding the group. I don't see myself as more important than the other people sitting at the table.
-------------------------------------------------------------------------------------------------------------------------------
So, I spent the chunk of the weekend absorbing the rules to a new RPG. It stood as a bit of a contrast to some things being said here.
For one thing, they refer to the Game Moderator, rather than "Master".
On page 3, they players are informed that part of their job is to "Maximize Everyone's Fun".
On Page 5, the GM is told about "Sharing the Creative Space"
At the beginning on the section about Moderating the game, they say the following:
"As the Game Moderator, you describe the world around the heroes, giving them people and places to interact with, and then engage in discussion with the players to move the story forward."
The GM is told that they should apply the rules, and make rulings, but the examples (and the book gives many) are of discussion and negotiation, rather than "laying down the law".
Oh, and in this game, characters may be taken out of a scene, but they don't die unless the player decides that is what they want to have happen.
I have been wondering if part of the issue we are running into stems from the choice all those decades ago to say "Dungeon Master". I'm honestly a little sick of that title, especially since it doesn't seem accurate.
(And no, I don't see the problem in it being related to "Master of Ceremonies" as I'm sure someone will immediately say, for one thing, that title seems to apply to officially hosted events which are like stage productions. Which is not how I'd describe most DnD games)
--------------------------------------------------------------------------------------------------------------------------------
I had one experience as a DM where it was a frustrating mess for me to run, and I had another experience where as a player I found it difficult to navigate the game-world when it kept changing on pretty basic levels. While any two points will make a line, it at least seems plausible that I have preferences for setting that at least are mostly from one mind, and that don't change in play. That doesn't mean people with different preferences are wrong, though it plausibly indicates we shouldn't game together.
See, that is the thing though.
A lot of people don't present this as a preference. A lot of people present it as though a collaboratively built world must by its very nature be an inferior product.
The "change in play" is a sign, to me, of a poorly executed version of what we are talking about. Especially since it caused problems for you to be able to navigate the world.
Just because the only time someone served hotdogs to you they were burnt black and tasted horrible doesn't mean that it is impossible to make a hotdog that tastes good.
----------------------------------------------------------------------------------------------------------------
I doubt that. I would have to see some actual data on that assertion, not just your personal opinion, as several threads on these forums and others leads me to believe otherwise.
I could point to several games I have played and several more that I have watched and a lot of conversations on these forums that would tell me that I am right.
Sure you can run it that way, a way it was not really intended to be run, but I doubt many people will. I think most people will continue to run it the way the books instruct them to run it, with the DM having authority over the game.
So.. because most people will continue doing a thing means... what exactly? You admit it is possible, so why can't we discuss doing it.