Though exactly like NSFW/NSFL and bot posts (which people avoid so replying can feel like a honeypot experience where a conversation was invited but unlikely to be fruitful, since even the poster themselves will never read your message), it's not only the item itself but rather the lack of proper labeling. AI slop could arguably, theoretically, for some people (I'm trying to frame this so as to lessen the chances of being flamed here!) be enjoyable, but cannot be acceptable in the wider community unless properly labeled. This "restriction" enables us to be more fully free to have our own enjoyment of this shared space.

Edit: for context, I had not even gotten to the existing flame war down below your comment yet, but somehow I knew it was coming! The Threadiverse seems to love to hate on AI almost as much as Windows and tankies!:-P (and ironically all for the same underlying reason: because consent should matter, even/especially when others say differently)