Suicide, a permanent solution to a temporary problem, and the most selfish, cruel and cowardly way to go. They think nothing of what that will do to those who love and care for them, only of their own issues.
I agree with your statement, but everybody feels down now and again. Moates' might have been suffering from a psychological condition that was a result of the pain from his past injuries, compounding his predicament.
That's why it's important for some people diagnosed with these conditions to stay on their medication because bad things can ensue if they don't. Don't be so quick to judge.
"What does it matter where you lay once you're dead? In a dirty sump or in a marble tower on top of a high hill? You were dead, you were sleeping the big sleep, you are not bothered by things like that, oil and water are the same as wind and air to you. You just slept the big sleep, not caring about the nastiness of how you died or where you fell."