Some things are just art, capable of being truly understood only by a creature with a head and heart, arms & legs, love & hate, emotions, experiences — in short, a man.
An autonomous agent doesn't need to understand the underlying emotion, it just needs to mimic it.
A autonomous car doesn't know why it shouldn't hit a child that jumps into its path, or why it is making any decisions at all despite those being some of the most important and fundamental to humans on earth. It just needs to reproduce the actions of a human that does understand those things.
Yes, I believe that artificial creativity will produce art will be indistinguishable from that made by humans.