Tragically, most mutants use their powers to either save the world or terrorize it. At least this is the popular depiction in Marvel Comics. Imagine what Magneto could do if he worked in construction. For one thing, all of those New York City public works project would have their completion dates moved up from 2018 to roughly five minutes from now. But instead, he spends his time sinking Russian submarines and making asteroid bases to live in. For the love of God, the man has the power to build himself a high-tech home in space. He could repair the Hubbell telescope with no trouble whatsoever.
(hat tip: Yglesias)