Good point. Pity that you did not get an answer. You could have replied that if your game makes that much money you would start commissioning real art.
I am not a fan of AI pics in general. But for some games they are one of the few ways to make a game at all and have visuals. And I think any game developer that has the choice is wise to not chose AI. It is unpopular. It looks boring. There is a reason a lot of the AI games are instantly recogniseable.