It's actually more pathetic to ask stories rooted in children's myths to carry the weight of Film Noir so that the reader doesn't have to admit they still like fairy tales.
And if you're still reading superhero comics? You love fairy tales, no matter what literary pretentions under which you try to hide it.
All that said, there's room for superhero comics to get serious (ala Watchmen or "Born Again"). But every superhero comic need not walk that path.