Someone posed this question in the context of police / prison abolition.
If the system is going to fuck you over and probably kill you anyway, why should you feel bad about, e.g., cops being killed? They don't care about you.
Billionaires and their cronies have built an entire society around extracting wealth in exchange for making bigoted authoritarians more powerful, to the point the world is literally on fire.
Why should we care if one of them dies? They don't see themselves as one of us.
Anti-trans bigots have this weird tic of wanting to be loved and admired despite saying and doing horrendous things. Why should any trans person care if JKR or Elon Musk dies horribly?
"Be the better person" is usually the response, but the expectation of one-way sympathy, deference, and even submission is part of the system of oppression they use.
Why should we?
This is a question I think about a lot, actually, in a personal sense and through most of my writing, where the protagonists tend to be alienated from their society.
People on the inside and in good standing with their culture often can't see the ways that it's abusive and oppressive to others.
People on the outside, the marginalized and vulnerable, are often aware of nothing else even as they're bombarded with messages to conform -- to a system that won't accept them anyway, regardless.