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I think I know what it is you're missing: comic books are written by people. This is a discussion about who would win: Batman, or Superman. We're referring to these two fictional characters as people with those powers...not the little fictional characters inside that world. Superman's powers, all things being equal, dwarf Batman's.
As for your "idiot in movies" line -- I'm not going to dignify that with anything more than this: if you have to resort to petty insults mostly unrelated to the current argument, you're only revealing the weakness of your own argument. I could respond the same way, but, you see, I usually attack a person's ARGUMENTS, rather than the person themselves, because if I attack the actual person, then it becomes obvious very quickly that there isn't much about their argument that I can attack.