So what is your alternative then ?
I'm sure there are thousands of people world wide who would love to be able to flick a switch and just turn themselves off to escape the misery of they are in!
If you were given a choice to be stuck in a bed, being fed cocktails of drugs to keep your failing body clinging to life, all the while your family and friends get to experience watching you decay, wouldn't you want a way out ? Not just to relieve your trauma but to let your family get their lives straightened out as well ?
Or are you the sort of person who thinks that would condem you to eternal torment because you failed to endure the years of agony he/she/it/they had lined up for you ?
Everyone has a choice, let people chose their own fate. And if the person is not able to chose for themselves, then let their friends, family and loved ones chose for them.