"In war, the question never is whether people will die," Marco said calmly. "No matter what you do, people will die. Lots of people. The only question is who, and how many. If it's them," Marco nodded at Appa and Momo, "or the lives of a group of people, and those people die because you tried to save everybody and failed, what would you tell them? That you were too busy trying to take the moral option and avoid making a decision to focus on them? And dude, don't try to tell me that you can fix everything by dying. The only certainly there is that you'll be dead at the end of it. For all you know, you're big heroic sacrifice will do jack all and save neither. And hey, then there's no one left to protect anybody, all because you thought, 'oh, well picking a priority is too hard, so I'll just off myself and leave you to fend for yourselves'."