If AI can create art without infringing on an artists copyright, I don't take an artist's product without paying. I'm taking a product comparable to what an artist is offering without paying the artist.
It isn't, though. It never can be. An AI's art will inevitable be souless, other images mashed together into a single form. Art makes up RPG products as much as anything. Consider Gith's current popularity and how much if that may be due to them striking while the iron was hot, being THE face of the Fiend Folio back in the day. If you're skimping on the art, well, why don't we just, give all the text to an AI? Who cares about wanting a good product, its just filling space, so just make an AI write up the lore. It'll be contractradictory and it'll suck, sure, but now we don't have to pay writers or bookkeepers or people who have to pay attention to things. But its vaguely comparable to what they'd do!
Art is an important part of the book. If you're skimping on it (because, that's what using AI art is), then you're basically cheating out on making a product worth what it should be. Then, where does the level of care stop? Scrapped the care for art, why not just, do the same to text, to stats, to everything else. Just suck all the flavour and character of something being written and pass it off to a computer regurgitating words it cannot comprehend
If AI manages to create superior art, people should use it. I don't see why artists should deserve more protection than lamplighters.
No AI art will ever be superior. It can't be simply due to how its made. There's no meaning behind anything the AI generates. The earnest, heart-felt strangeness of any comic of Tails Gets Trolled (uh, google at your own risk, kinda NSFW) has infinitely more value than anything an AI has ever. Its classic image of Tails, the go to absolute meme of it, isn't the most technically drawn thing out there. But its sheer meaning has made it a classic. You probably know the image even if you haven't seen the comic