So if AI can't emulate it, what's the issue?

I do think AI can emulate it - one of the earliest headlines I remember is an AI piece winning a digital art competition. The piece was great and the influence of the (human) artist was obvious.

If something is beautiful, I can't be assed to care what kind of paint was used to create it. If you trust human beings to continue to appreciate art as we have done since the beginning, there's not going to be any intractable issues.