IMO the original painting is art, a faithful copy is also lesser art, but a print is not art, because it takes significantly less skill and creativity to print thousands of it. It isn't worthless nor slop, though.

Basically, art speaks to our sensibilities, so we expect to find a message in there. LLMs can't create, only mix-and-match what exists in their training data set. You could slop a new painting, make a special canvas printer, and exhibit it in a blind test. Some people will think it's art because they find meaning in it, while others will think it's not art because they'll recognize several meanings slopped together in a nonsensical way.

In reality, it was never art, because the creator, a statistical algorithm, never had any message to convey in the first place.