That you disagree or not is of no consequences. All optional rules are homebrew. Whether or not a DM applies them is a table's choice. Thus it is homebrewing as no two DM will have the exact same optional rules from every books printed so far. I do not use TCoE yet, I did translate and put the variant artificer that was added in there for my campaign. So the combination of official options IS homebrewing.
A position that no one has ever seriously taken before, because "homebrewing" is the act of creating your own rules. Optional Rules are not rules you have created yourself. But sure, every feat is homebrew (because all feats are optional) all magic items are homebrew (because all magic items are optional), Rolling dice to create your stats is homebrew (because it is an optional rule) ect, ect ect. We'll just destroy everyone's understanding of what official rules are so we can state that Demon Lords aren't gods, because it is clearly that important.
Again, that you disagree has no bearing of wether it is or not. Again in some setting Orcus does not even exist! In the above quote from the Demonomicon of Iggwilv in the 4ed. Orcus was formerly a primordial that was corrupted into demonic form... we are far from a mortal as mortals did not existed yet... So you were right for Orcus in the Realms. But wrong on so many other realm. That is why I usually go for Core or General books that are supposed to be applied to all settings (unless said setting say otherwise)
And many of those core books are written on the assumptions of settings, so all of them would be homebrew too. Like i said, it is an extreme position that I don't think is worth taking.
Wrong again. 1ed Orcus has been killed by countless groups and even individuals. Even gods were killed. Raistlin, comes to mind. He had succeeded. And what about Cyric? He killed a god too and he was a mortal.
Then build me an official 5e level 20 Bard, with no homebrew options, that can kill 5e Orcus in a straight up fight in his lair. Since I'm wrong you should be able to do so easily, correct?
Also, Raistlin and Cyric had absurd amounts of plot armor, because they were novel characters, so I don't really think they should count for how the game play loop works.
Also, if individuals can kill gods.... then Demon Lords are still not weaker than gods, the point I keep making, which is one of the major points that people keep saying is the reason we need Evil Gods, because they are more powerful.
Agreed. But what purpose are left for the clerics if everyone can heal? This is where I am starting to wonder the "relevance" of the cleric class. If evil gods can be so easily discarded, why not discard all gods...
Because religion is still an interesting story. Cleric's have been more than healing robots for a long time, and I don't see the fact that other people can heal as something that ruins the purpose for their existence.