User blog comment:CNBA3/Power Users and Real Life./@comment-5060540-20130715232632/@comment-4867780-20130716081408

Many villains have insane durability and are effectively immune to bullets, others are even worse. Just magine what an evil Charles Xavier could do...

Civilians and governements would have no choice but to rely on superheroes to face the villains abilities, villains on the other side would have everyone against them (powerful and unreliable). So I guess the good guys would have the advantage and many villains would stay put.

On the other hand, their care for civilians casualities makes them vulnerable, and at the slighest slip "for the greater good", the trust earned will fall appart and the public opinion will (understandably) turn on them. Plus the most powerful/smart villains could take over a whole country, then use civilians and institutions as weapons to hunt the heros down.

I'm not saying there's no benefits, I'm just saying the sheer magnitude of the collateral damages (material and psychological) would make the whole superpower thing simply not worth it. Like Mordin Solus once said in Mass Effect 2 : "It's like giving nuclear weapons to cavemen".