As someone who is considered sane, with no known issues of depression, and a parent, I can say unequivocally that under no circumstance would I let a child die, regardless of circumstances. Finances, mortgage, whatever don't factor for a second into that decision.

Once you have a child, you realize this world isn't about you, and absolutely all you have left when you pass is your offspring and those who you impacted in life.

This is a tragedy but in no way should they be condemned for trying to save their offspring. Everything is not black and white as you would like to believe it is, and even if it defies your logic, there is definitely more than one perspective here.