Most of the things you made mention of here are quite normal and occur most times but you seldom see people quote AI here. If we fully allow the use of AI that it becomes a normal thing then post quality will drop drastically because the contemplation would be , why waste time on research when I can just ask an AI and then paste it here in quotes.

The idea of using AI too much is more like a plagiarism issue because in the  end no matter how much you try to put it you are still copying a text or idea that isn't yours.