I'm not depressed in the slightest myself, but I just don't see why we try to keep all people alive, all the time, at all cost. Yes, I'm exaggerating a bit, but at some point life ends, and I'm fine with that.
If I have had a nice length of life (lets say something like 70 years), and am no longer happy, healthy or capable of taking care of myself, don't save me next time I need saving (in order to live longer).