Still, that comes straight out of THE DARK KNIGHT which is WB’s model for superhero movies.
“You either die a hero, or you live long enough to see yourself become the villain.”
In the end, Batman doesn’t even consider himself to be a hero. He’s more a scapegoat - someone who can do what’s needed and take the blame for it. In Lev Grossman’s THE MAGICIANS, a central theme is that “a hero is the one who pays the price.” It’s the same principle - society (or the audience) wants someone to step up and do what they are all afraid to do, and then accept the punishment for doing it. That’s the basic literary hero - and Nolan basically made Batman that kind of hero. This is why A TALE OF TWO CITIES is brought up in THE DARK KNIGHT RISES. It is probably one of the greatest works in regard to literary heroism (along with LES MISERABLES, to which TDKR also seemed to obliquely refer).
A “super-hero” is someone who does what everyone wants to be able to do, but has the power to decline or forego the consequences for it. It’s an “escapist” hero. It’s not really the superpowers that define whether a hero is or is not “super”, but the dramatic or melodramatic consequences of the story.