What if the course of action you're proposing actually has worse and more widespread consequences? You can't say for sure that it won't, and wouldn't that invalidate the entire point?

[He's calmed again, tone quiet and contemplative.]

But if you want to have this sort of conversation with people and convince them to even consider what you're advocating for, I'd suggest finding a way to approach it that doesn't involve telling them they're selfish for wanting to live and then being shocked when they take it badly. It isn't wrong to want to survive.