Regarding moderator changing the content — I don't like it, this has happened to me on other forums, but not here, if it happened here, I'm not aware of it.
I have had post deletions though, which I don't stress over.
Some sites like reddit, twitter, youtube etc are famous for becoming successful by overcontrolling members.
In my experience, Reddit is much freer, Twitter — I'd rate it lower than Reddit and I'd rate YT worst — YT's stupid AI mod blocks whatever it wants, even if your comment doesn't contain anything worth censoring, gave up lately to even bother to make a comment there.