In the real world, I don't think people would believe in superheroes who could fly, lift several tons of material or race through town in sleek cars. Humanity is too selfish and jaded for that. If there really was a person who could save us from everything, I think they'd be treated something like ghosts or Sasquatch. The police would deny their existence, the CIA and FBI would conceal their files on them and the tabloids would be scrambling over each other to get pictures of them. Not only that , but they'd be constantly flitting in and out of public to hide their identities.
When I was in high school, I wrote short stories where I turned all my "girlfriends" into costumed heroines. Not that I had something against male superheroes, I just thought female superheroes were more interesting.