For Batman specifically I think it starts as a way to clean up Gotham. He’ll quit just as soon as Gotham is cleaned up. But of course it’s a neverending task. Plus even if he cleaned up Gotham, how can he stop there? How can he stop when there is so much left to do.

But! That’s why I like Batman working with the Justice League and Superman specifically. He can never go back to being Bruce Wayne, he’ll always be Batman, but at least with Superman he gets his moments of comfort, however brief they may be.

Batman is cursed to be Batman and not Bruce Wayne. That’s his character.

I’m not against changing some aspects of his character. And as you noted other characters strike a balance. But those are other characters. If we’re changing too much of a character, maybe we just tell that different character’s story instead.

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As for Spider-Man, that is a character who, depending on the story and timeline of that story, does try to strike a balance. In terms of being poor I think it’s a matter of being independent. Whenever he works for someone, they tend to want to do things their way. Even if he agrees or he’s doing what he wanted to do, there is still that layer of dependence.