AI art is soulless "beauty"; real art is beautiful in part because of the amount of work that went into it
Even if you don't personally like a work of art, you can at least acknowledge that the artist put effort into it, put some part of themselves into it. It isn't just a matter of whatever aesthetic appeal it may have. It's about the labor that went into it, and the person behind it. AI art may appear aesthetically pleasing, but somehow the fact that there's no humanity behind it always shows through.