It boils down to using popular models which are popular because that is what majority of people like, style-wise and what they perpetuate with their "variants" of the style models etc.People who use AI to generate art like this, how come it always looks like it's made by an AI, is there no way to create something that looks original or does it just boil down to laziness? It's my biggest complain, not even half a second of looking at it you know it's made by AI.
This complaint is kind of like complaining that bulk of anime shows use the same aesthetics, when this is something that the creators have been advised/trained to drawn through all those "how to draw X" books and all the shows they've watched, and the public have been "trained" to watch, like, and expect.