Even having a polite disagreement about, for example, anything to do with “trans,” is grounds for being banned.
A subreddit I moderate, /r/moderatepolitics, has had to do a delicate balancing act around this. There are site-wide rules banning many statements around trans people, and the red lines are not well defined. Reddit's "Anti-Evil Operations" (site-wide moderation team) frequently swoops in and deletes comments that are offensive to trans people, but well within current political discourse in the US. That has undermined our mission of being a forum for diverse voices to hold productive but difficult discussions. At a certain point, we entirely banned the discussion of trans issues because one side was able to speak freely and the other side was walking on egg shells. I'm solidly pro-trans, but that's no way to have a conversation.
This likely was done to try to keep Reddit from becoming a cesspool like the "free speech" sites like Gab, but it has turned out to be a lazy way that short circuits necessary conversations.