I would suggest you consider toning down your outrage. It's important and necessary to be able to compare and contrast tragedies without devolving into arguments about the incommensurability of human life. Such discussions may appear cold and calculating ("inhumane") but we must have them - ignoring a part of reality because it hurts does not make it go away.
I have seen reactions similar to yours around people unused to discussing issues like medical triage. If we truly want to understand a phenomenon, mitigate its impact, and do the actual most good, we need to be able to analyze and compare things from all angles: social, economic, political, moral, emotional, etc.
So long as such discussions are conducted in a shared context of understanding how weighty and intense these issues are (as it seems to me the parent was doing), they are for the good.