I mean, that's a different argument than saying value of life doesn't matter. Value of life is relevant when comparing different possible actions that cost dif

I mean, that's a different argument than saying value of life doesn't matter. Value of life is relevant when comparing different possible actions that cost different amounts of resources. If it's clear that the benefit is more than the cost, you might not actually have to do the analysis. But if the cost is measured in trillions of dollars, then it becomes very relevant to see exactly what the expected benefits are. If the invading army is going to kill a hundred thousand people, and defending against them requires using up resources equivalent to letting five hundred thousand people die, then it's very much a question that should be asked.