Why do heroes have to be super?

[king.com]

I never said an ordinary person, but a competent person sure. A policemen or a soldier doesn't have superhuman capabilities yet there are countless records of soldiers & such doing heroic things, look at the exploits of one John L Barkley or Teddy Roosevelt, I've always viewed heroes as the ones that "could get the job done" not necessarily the ones with the biggest toys, i.e. +x weapons of x, & more broken spell combos than you can shake a stick at.

One of the reasons Dark Heresy is my favourite roleplaying game. Your just ordinary people, with that barest hint of potential, where everything and everyone in the universe is more powerful and dangerous than you and its your job to stop them.