To me, AI art (be it music, paintings, poems, whatever) is all about the end result, whereas art made with your own hands is about the journey of honing your craft. The joy of doing, instead of instant gratification.
Being fast and pumping out content, which to me seems to be the main sentiment that AI promotes, is not the point of making art.
I'm not saying you can't make art with AI, it's just that I think something crucial gets lost in the process. But that's just me. I might change my mind someday, who knows.