The comics I read as a kid were much more influenced by TV and movies. Encountering superheroes as an adult without that kind of childhood sentimentality, it just doesn't allow you, or in my case at least, it wouldn't let me take the characters seriously.
Realism is always subjective in film. There's no such thing as cinema verite. The only true cinema verite would be what Andy Warhol did with his film about the Empire State Building - eight hours or so from one angle, and even then it's not really cinema verite, because you aren't actually there.