I actually don't think it would be obvious. By not explicitly saying Indiana Jones when so obviously describing Indiana Jones, there is an implication present. But I think many human artists would probably ask you, "Wait, so Indiana Jones, or are you looking for something different," before immediately diving in.

So why didn’t the AI ask for clarification?

I‘m not so sure, unless you are playing a game of “name the character” you generally don‘t want Indiana Jones unless you explicitly mention Indiana Jones. Indiana Jones is a well known character, if you want a picture of Indiana Jones it is simple enough to just say: “Draw me a picture of Indiana Jones”. The fact that they didn’t say that, most likely means they don‘t want that.

This seems pretty easy to test - can we just change the prompt to specifically exclude Indiana Jones?