I suspect part of the taste problem is that the average person…has no taste (which is why so much AI slop is being shared to begin with). I also see no reason to believe that this isn’t a problem to be fixed, rather than some inherit limitation of generative AI.

That's fair but maybe it's a dangling carrot. Human taste will always be just out of reach for most, robots included. Avante-garde had it right all along.