I wouldn't want to get caught taking the position that anything isn't art.
That kind of position gets you in trouble. I think of Roger Ebert and his absurd denial that video games are art. I'd get in trouble if I said "The Mona Lisa isn't art, it's just crap. Sheeple get on a plane to Paris, rush to the Louvre, see a little bit of the Mona Lisa not obscured by the flock, skip the other paintings, rush back to the airport and go home."
If somebody frames a print of the Stable Diffusion output and it gives them pleasure I can't take that away from them. If I owned a "Umberto Boccioni" painting that wasn't made by Umberto Boccioni, I'd feel like I'd been cheated, but I don't feel that a DALL-E 2 generated magazine cover is "not a magazine cover".
The kind of artist who sells works for $1,000,000+ frequently has a team of artists who do the actual work, just as Jim Davis hired out most of the work for the Garfield comic strip. A Terminator 2 that looks like artist could hardly be more corrupt than some in the art world, see
https://socratesinthecity.com/socrates-picks/the-painted-wor...