Earlier quoted context omitted.
First of all, we're discussing stock photography, not art. Second of all, Turing's arguments for why the Turing machine is a decent model of the brain seem pretty hard to bet against, and the Turing machine underlies all computation.
No - we're discussing whether someone producing stock photography can be trained in the same sense as a.i. However, I will give you that I'm potentially falsely assuming creativity is required to a comparable degree to art. Also, gun-to-my-head I would not bet on creativity being systemetizable, so I completely disagree.
Where you're going wrong is what society will go for. Given the choice between reality and fantasy ... society will choose fantasy. AI will "win" fantasy, hands down.