Argument by straw man and false dichotomy. The world is not made up entirely of cynical people who accept the system around them, and Ender Wiggins.

Putting forward the proposition, as fiction so often does, that all the world needs is heroes with the courage to change the world, is destructive, as it diverts the efforts of the heroic down unproductive paths. Sure, they should want to change the world--but the only context this kind of quote ever occurs in is ones where the hero is uncompromising and eventually wins out due to his moral, physical, and/or mental superiority.