Is the machine prompting itself now or is the human no longer in the loop?
The keyword here is "ontological."
Even if AI can make elegant images, those images have no meaning *to it.* There is an element in artistry related to technical skill, but the main purpose of art is to express meaning.
When you see a painting and think about what the artist is trying to say to you, that only exists because of our shared experience living human lives. A machine can give you the techniques, it might even be able to arrange them in some "meaningful" way sort of like an art encyclopedia, but it cannot express *its own* meaning.
Don't get me wrong, a LOT of artists will continue to lose work because of AI, but what's left will be the one's who use it as a medium to express their hearts.