It has nothing to do with being a coward. Mental ilness really does raise suicidal contemplation. We can't really put ourselves in that persons mind, it's impossible. We don't understand if a "stupid" thing is "huge" for them. I find it inconsiderate how anyone can think it's stupid and cowardly.
I can tell you, because I went into a deep depression back in 07'. It last almost 4 years, but it's past now. I just to believe it was stupid things, but now looking back... they were stupid, but it was huge for me. And at my past state, it made me deeply sadden.
However, something I can say to those who contemplate suicide. Life is suffering, fact. We don't know where we are going afterwards, so you might as well do everything in your power to find the beauty in life.
Since being out of my depression, can't say everything's been perfect, but I've realized that had I actually done it... it would have been a mistake, I could have never undo. My mom, friends would have suffered. Now they are enjoying life alongside me. Now I'm a college student, have a large circle of friends, girls, job... etc. None of those I had before, but I fought for those things. And isn't that what life is all about? Suffering, but fighting against it? It can't win the battle.