It would fucking suck to live in the Marvel Universe as a non-superhero. You can identify with the protagonists, you can fantasize about being Tony Stark or whoever, but if you think about the civilians in those movies, the randos killed by the robot or sucked into the portal, it's hard to see the existence of superheroes as a net positive. They mostly seem to clean up problems that wouldn't have occurred in the first place without their egos and mistakes. Superman has a different emphasis though. The fantasy isn't just about having superpowers yourself, but about what if the natural disaster equivalent only did property damage, what if military aggression could be stopped in its tracks without a single civilian casualty, what if the evillest people in the world actually got their comeuppance.