I saw the same take in other contexts, and it made a lot of sense. Basically, heroes having superpowers is the core of the issue: they are by definition above

I saw the same take in other contexts, and it made a lot of sense. Basically, heroes having superpowers is the core of the issue: they are by definition above everyone else, and are in a position to topple the world order to push their objectives. Assuming they want to make the world a better place, they’d probably succeed in being a kind of messia, and if they can reach their goal the story ends and the franchise is done (alternatively new heroes are born within the same franchise, but it’s another line) Assuming they want to fix the world in a way that is problematic, or are straight evil from the start, they’ll fit in the villains slot. In the end, the only path for overpowered heroes keep a series going on is for them to keep the status quo eternally. It can be explicited or the series might just never progress towards its end goal, but that’s a basic necessity for a superhero series to have any longevity. The interesting side effect of that is, these heroes will often live in deeply flawed societies with rampant crime and/or inegalities, villains will usually have a back story justifying their anger but extreme means to solve it, and the heroes will still be there to stop that villain but neatly keep that rotten status quo.