Humans certainly don’t make new things out of nothing. They also take from different sources and combine them together to make something new, whether that’s direct inspiration or on a more abstract level through the brain.
Learning models aren’t generating art any more than GIMP or Photoshop is. It’s the person behind the tool that makes the art, not the tool. There’s certainly an art to prompt smithing.
I feel like a lot of people dismiss generated art simply because it’s new (and because as a byproduct is spits out dozens of junk pieces before getting anywhere good). I don’t see how it’s that different from someone using photo-editing software built with dozens of algorithms instead of a ‘pure’ drawing pad, or someone using a drawing pad instead of a pencil, or someone using a pencil instead of chalk. It’s a tool, and a great one at that in comparison to many digital tools for artists.