What comes first the super hero or the super villain?

Does the presence of super villains spawn the super hero or do super heroes attract super villains?

And if the latter is the case, is it really such a good thing to have a super hero? I mean these places were bad before but surely they didnt have people like the joker or venom terrorizing the civilians. And like the Joker said in Dark Knight “theres no going back, you’ve changed things.” so once a super hero arrives at a city they are forever doomed to be terrorized. Would Metropolis or Gotham have been better off if Clark Kent was just a reporter or Bruce Wayne just a rich playboy?

These is obviously excluding super hero/villains like x-men where its just a predisposed mutation where part of the population is effected and part not.