I think the point is that for a lot of them there are endless possible alternatives to the character design, but it still generates one with the exact same design. Why can't, for example, the image of Tomb Raider have a different colored tank top? Why is she wearing a tank top and not a shirt? Why does she have to have a gun? Why is she a busty, attractive brunette? These are all things that could be different but the dominance of Lara Croft's image and strong association with the words "tomb raider" in popular culture clearly influences the model's output.

Because it's not clear that that's what you want. What's the context? Are we playing a game where I guess a character? Is it a design session for a new character based on a well known one, maybe a sidekick? Is it a new take on an old character? Are you just trying to remember what a well-known character looks like, and giving a brief prompt?

It's not clear what the asker wants, and the obvious answer is probably the culturally relevant one. Hell, I'd give you the same answers as the AI did here if I had the ability to spit out perfect replicas.

And how is that bad or surprising? It’s actually what I would expect from how AI works.