That's the problem with superhero stories. The story needs to begin and end with the world in a state similar to our own (for relatabilitiy and sequel potential) despite the vast power of its protagonist, so the hero must ultimately be concerned with preserving the status quo.
It's one of the reasons why superhero movies are in decline now that all the most famous storylines have already been adapted, and why comic book sales have been going downhill ever since they started taking themselves seriously.