What would you rather people do about the Witches and kishin eggs? Nothing? I disagree that we can't prevent more people from dying. Turning into Kishin Eggs would be more difficult to control since that's dependent on what outside people do, but preventative action is better than no action at all.

[Or is it? Hiro's pretty sure this is an argument with no clear way to win (not that winning mattered). All he can do is try to avoid digging himself a deeper grave.]