You've given me the impression that everything they say must be true unless proven wrong, despite knowing next to nothing about them. I prefer to be skeptical of it until it's proven correct. And I feel I have enough evidence to justify it.
Nothing can be proven true, only proven false. The closest to "proven to be true" is simply
not proven untrue. You haven't given enough evidence to prove that their ideas on cosmology in particular are untrue. I also haven't seen much in the way of evidence that heavily supports any alternate thesis. And, again, disproving one thesis does not automatically validate another. For example, say mortals think Nirn is flat; then you disprove that using some quality evidence, and then you say Nirn is round, supporting it using only the evidence you used to disprove the "flat" theory. It could be in the shape of a cube or some strange polygon shape for all you know so long as there's no evidence to support anything. Or, even if it is round, would you be assuming round as in like planets? What if it's round but a dyson sphere?
For now, we either have T0's theorem to go on, or nothing. Not to say "T0 or bust", as I do think it is entirely possible they could be wrong about some things (to say they are wrong about each and every thing would be a lot more of a stretch), but there's really not much other information that can be used to figure out what
is correct. The problem is, you seem to be ignoring that and talking about your theory as if it is correct for certain, and when asked for evidence you rely on some rather silly bits of evidence such as CS cell settings and/or attacking the Temple Zero Society.
Same difference in this context.
It's a matter of taste, I prefer not to assume everything to be bizarre, I don't find that kind of thing as interesting as reality. It feels silly to try to rewrite all of how reality works while taking into account all the mundane phenomena we've witnessed just to make things more bizarre. Fantasy and science fiction need not play by completely different rules.
Edit: To me, bizarre implications ultimately limit things outside of Nirn, making them less dynamic and independent. I prefer a system where Nirn is but a small part of the goings-on in the universe, and where you can't believe everything written by mortals. Especially in a world not fully explored by its inhabitants, and where the implications of the power of myth on the plane can make people overconfident in what they think.
Bizarre implications aren't necessarily limitations, they are just "bizarre". I can look up the terms in a dictionary for you if need be. Of course, you can also have bizarre limitations. It feels silly to throw out nearly all of the lore of how a particular universe works and just say that it really works the same way as the real world. That would make the lore almost totally pointless and only serving a role as fluff, which would be a huge waste in TES due to the amount and intricacy of the lore. And as I've stated in another thread, having to keep some semblance of real world phenomena around is virtually a requirement, or else it becomes very, very hard to make sense of. Remember what I said about bizarre lore having the effect of causing people to think? If the thinking part can't go anywhere, it becomes pointless, and that would be a waste.
Whether rewriting all of the mechanics of reality is silly or not, the developers did it. If they didn't, there'd be far less lore than exists currently, and TES would be no more interesting than [insert random generic fantasy universe here].
I wouldn't say what goes on in Nirn is a small piece of the puzzle, since it's pretty much the big melting pot of the Aurbis, but I do agree that places that exist elsewhere do have a lot more going on than mortals care to give them credit for. Battlespire, for one, showed quite a bit of intrigue that exists among Daedra and Daedric Princes.