This seems to have two mostly-orthogonal components to consider, both of which don't seem like things we can actually discuss:

• First, the possibility that not-working-constantly may make the superhero more productive, and have other benefits which ultimately cash out as productivity. This is an empirical question, so it makes no sense to discuss it for superheroes.
• Second, the extent to which one is obligated to sacrifice one's own non-inclusive wellbeing for others. Some people are roughly consequentialists, others are psychopaths, and there is no way to argue our way out of the disagreement - disagreements about values are settled by negotiation or by debellation, not by argument.

And this applies as much to superheroes as to the rest of us.