Really, NN-based art is just a more abstract kind of sampling - blundering around inside a human-originated space, bumping off the walls, looking for the occasional example that a human will find interesting.
It's still mechanical, it's still mimicry, and it's still repetitive. Even if nice things fall out - and sometimes they do - they're really just distortions of the originals. (That's particularly obvious in the library "paintings.")
They're still waiting for a human to say "I like that", but with no sense of what makes a human say that.
It reminds me of fractal art - pretty, but monotonous and disposable.
How many people can remember their favourite example of fractal art?