Think about post modern art. Objectively, it's often enough just a bit of paint plus an explanation that is supposed to have meaning. How could you tell, that this is not generated bullshit? Seriously.

Art is basically just a genetic algorithm. Thousands of artists try different stuff based more or less on previous works, some succeed, most don't. The next art pieces will be heavier influenced by the previously successful art and thus lean more in that direction. Over time, saturation sets in, more experimental art wins, creates a new style, cycle begins again.

There's nothing inherently human in that. You'll find hundreds of thousands of crappy drawings, bullshit statues, etc., but you won't see them in history books. You only see what was loaded with meaning after the fact. Put an AI in place that generates thousands of images with different and new styles based in varying degrees on existing art, and you'll see a similar process (given a proper feedback loop).

Art fundamentally is an illusion. We give stuff meaning. Not the artist, but the rest of the world.