Everything that anyone creates is art. That does not equate to "everything created is same in terms of artistic quality". And if you are really going back to the same worn out argument as to what people consider and do not consider art, lets ignore it since that also ignores one simple fact -- you are still using theft machines. You are still using products that resell others hard work.
And while of course every artist would like to be paid for what they create, the reality is that people pirate and share, often withouth credit -- CoC2 developers are certainly privy to that fact. So at least what we can do is when reposting someones piece, pirating their movie or game is to credit them. At least that way, if you like it, you are incentivized to seek out more of it by going to that artist/companies socials, store page and so on. Ai art, built on the back bone of those same artists, completely sidetracks that step, removes any incentive to go that specific artist whose art, more then likely, was used as a sample that then directly competes with them. The only one you are supporting then is the greedy monopolies that are formed aroudn those Ai companies.