There's a whole spectrum from sfw to nsfw but we don't give up and allow porn on every platform because drawing the line is "difficult". We can use common sense and taste, with all their flaws.

I wouldn't say that porn is not allowed on every platform. basically every mainstream "content posting" platform (fb, ig, tw, tiktok, etc) allows softcore porn, and in fact pushes it on users, both on content an on advertising. if the same was true with AI music I wouldn't bother with the platform