They have already made most of the images its the first thing done for updates. Besides that, using generators that limit the amount of generations one could do feels like it would hinder the process of trial and error needed to create satisfactory images.
Also lil bit rude to imply he doesn't get how to use ai at this point like sure I have seen mistakes in some images like mewtwo's horns(?) becoming three and eyes being strange but clearly he's got enough understanding to make proper images. I mean he never promised ultra quality when we have his description being "I write low quality porn for my own amusement."