a lot of art isn't always so much about the technique but the content. ai might make the gap from beginner and crap to pleasing to look at in a technical sense, but that doesn't mean the art it self will be interesting or meaningful.
if you really think art as a whole is at risk of being destroyed by ai you should go to your nearest high quality museum and really think if ai would make that. i know like half the posters are in the bay area lol, go to sf moma this weekend and think about this.