OP I think you have a narrow view of why people NC, for many of us it's not to say annoying things! Hopefully this thread has enlightened you?
I've been here good few years now and I NC every so often, for a number of reasons.
I have RL friends who post here too, and know who I am. Also DP knows my posting name. I NC if I'm going to talk about something sensitive, as I feel inhibited talking about very personal stuff if I think RL people might be reading it!
I also NC every so often just because I feel like it / think of a new name I like. This name relates to fertility goddesses, and I NCed to it before joining a TTC thread, after TTCing for some months already.
"are you so scared someone on here wont think you're great anymore?" I'm not here for a popularity contest! I find that a strange way of thinking tbh.
I like the anonymity of the site. I like that we can have a discussion about something and don't know who each other are. tbh sometimes I don't even look at people's names, I just read what they've said. I like the free exchange of ideas, and that even though many of us wouldn't cross paths in RL, as we come from massively different worlds, but we can have a chat without the usual societal assumptions and prejudices getting in the way. It makes it about what's being said, not the person so much, and I think this can be a good thing.
People have started recognising me with this name and I find it a bit odd tbh, I kind of assume I'm just talking into the ether and no one's really paying that much attention to what I say!
Having said that I guess I do like recognising posters from support threads (e.g. ante-natal / TTC), people I consider experts (e.g. tiktok) and posters whose political opinions I respect; also there are a handful of antagonistic bullies posters and rightwingers who I see and think "not you again!"