No, I don't think that's correct. The filtering tools are also useful for searching. It's harder that I'd like to find stuff on nostr, too, so it's not that I just want to "not be shown this" I want to be able to find things more easily.
Big tech using LLMs to block search results, prevent videos from being sent, or to even get people more angry in order to get them to spend more time on their platform. Those are detestable to me. I also hate sort algorithms. Being able to filter out CSAM or adjacent gross stuff like AI generated CSAM or other deviant images is a very reasonable thing for a relay operator to want since that can end their life, quite literally.
I do believe in free speech, but, that does not mean that I don't also respect people's right to association, too. If someone doesn't want to be associated with that kind of thing, there's very little they can do on a platform like nostr at this point.
You're probably correct that it will devolve into small-brained silos, but that already happens here so I don't see much point worrying about general human behavior.
I also agree that "hate speech" is best countered with better speech, but, you know, I don't really want to listen to hateful and gross things all day. 🤷♂️
The follow button is best accompanied by the block button.