I think I disagree; I know the trope about metal fans and music genres etc, but I would argue that having a “trance” community and a “classic rock” community is fine because it’s the same medium, sort of, in as much as it is all “music”, but its very different and not just because of the subject.

If the music communities were like “lovesongs”, “happysongs”, “sadsongs”, “angrysongs” etc, I think that would be closer to what this batch of AI spam communities are. Or maybe if it was a community for the key a song is in, like “songsing”, “songsina” etc