What message did Leonardo convey in Mona Lisa?
Are we sure you receive the same message?
If not, and if it doesn't matter if its the same messgae, then how is it different from not having message at the sender's end and only receiver assigning it?
Does the receiver become the artist then as first imposer of meaning?
Objectiveley we see a good technique and a women that smiled, but almost not smiled.
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.