Just look at fitness influencers, atheletes, male and female who have peak human bodies as examples, ppl like showing off their bodies when they are physically fit and look good.
I never got the whole oversexualized angle when it comed to most comic book appearences, they look very tame compared to rave or even gym outfits meant for mobility, do superheroes not need mobility?
So unless the superhero’s power is invulnerability, they’d wear armor for safety
Likely, but not necessarily. Throughout history armor has come and gone depending on advances in weaponry and it’s ability to counter the weapons used in battle. For instance, once cannons and guns were ubiquitous plate armor disappeared because it was heavy and useless. Kevlar changed that to some degree and now it’s back. So not much use wearing armor against jean grey, but punisher, definitely.