@Azoulas
Usually, suicide stems from such tremendous sorrow that it is almost impossible for someone else to imagine the pain that the person is feeling. If the person is truly suicidal, then it isn't about the pain anymore, or even the desire to feel happy. They just feel like the world doesn't need them, and they have been totally cast aside by it. When you truly feel like you are not needed, then it is a pain that is unbearable. Nobody cares, and nobody understands, because they are not you.
I actually almost commited suicide once, but I refrained from going through with it since I knew my little brother would be devastated. Since I'm his last living relative, I wouldn't want him to feel alone in this world.
But yes, in reality if something is not needed then it is thrown away. We are no exception.