I know that in writing class they tell you that you need to make the stakes personal for your character, but that’s bullshit. A person isn’t some kind of weirdo freak because he sees people struggling against a monstrous and intractable adversary and decides to help them. Or else, at least we should be able to recognize that empathy with strangers IS personal. You don’t need to have a literal personal loss to decide that it’s okay to help another person.
Threat Quality Press’ Braak making a larger point about heroes while musing on John Carter.