And I'm sure Mormons and other xtians that are not necessarily Nicean xtians might just say to those objecting that they are not "true" xtians: "well, that's like your opinion, man..." Or words to that effect. 🤣

I could easily see them pointing out - and probably many have; I have not read Mormon apologetics, though - that the Nicean Council was extra-biblical and put to a vote in a political atmosphere. Meaning, while the Book of Mormon is certainly a retcon (at least in my view), it can easily be argued that so is the Nicene Creed.

It makes a lot of sense why the ability for people to read "the" bible in their own language was something frowned on and often actively stamped out - under threat of death, even. Once the people are able to read the supposed holy documents for themselves, they are going to naturally start having their own interpretation of things, as well as start writing more fanfic to extend the cinematic universe of the original text(s)...it also explains why the printing press was followed by an explosion of xtian forks (or heresies, depending on the viewer's position).

They didn't? You have a source? That's news to me.