Human bodies are entities that do not want to die. The entire entity is structured so that it wants to live and will do everything in its power to not die. Whenever someone gets the idea to die, it is because they are stuck in a situation of perceived hopelessness that is a misfunction of what it means to be human. Want to know why you intervene with people who want to kill themselves? The reason why is that it isn't the way it is meant to be. And in a society that doesn't value life that sufficiently that it will, it then will show less regard for life in a lot of other areas.
I understand there is places of hopelessness, and it seems like a mercy killing would be appropriate. There is also the case of the separate situation where you keep someone in a vegetative state, or trying to save someone who would die shortly of natural causes. There is also easing pain of someone who is dying.
Anyhow, if you feel that people should have a right to off themselves, I am curious why you think that this is something someone would pick as their option if they had hope. Maybe the focus should be to give someone hope, rather than ending it all.
As for the guy with no arms and legs. He still has a mind, and can think and talk. Humans can work to give him tools to enable him to function. In an information age, the mind is a LOT more important than arms and legs.
