Superheroes are pretty pathetic if you think about it. And the more powerful they are, they more impotent they seem to be at effecting any real change. Let's face it, instead of spending hours punching bad guys as Batman, billionaire Bruce Wayne could do more a lot more for Gotham by creating some Green jobs for the unemployed.
Of course, it’s not too big a leap to say the same about any real person, especially those whom our society deems “important”: millionaires, politicians, celebrities. Imagine if they used their vast resources to make a real difference instead of just further self-aggrandizement. Maybe if we had more heroes in real life, we wouldn't have so great a need for them in comics (or film for those of you who don't read comics).
That said, I would absolutely fight crime in other universes if I had the opportunity.