Life in places with high concentrations of supers is obviously different. Xavier's Academy or Hogwarts or whatnot are fantasy fulfillment places, and operate on their own narrative logic.
If the governments and pop culture look overwhelmingly like ours, that wouldn't make sense if entrenched forces were reacting rationally to the realities of their world. Which I get why comic writers will gloss it over, I was just curious at what point it did become justifiable instead of us just having to mutually agree not to fridge logic the whole thing fall apart.