As you say OP, the solution here is to use the fediverse model as intended and use different instances/communities. It sucks because it fragments the community, but that’s the way it is. I’ve long held the opinion that I’m grateful to the lemmy developers for building this whole thing that we all get to enjoy, but their approach to administering an instance is reprehensible and actively damaging to the relatively free and open exchange of ideas that should happen on the fediverse.