So at what point do wise pretty people say: "Hmmm...too deviant from the normal human body...must allow them to be euthanized" versus "Hmmm...Ugly but onyl mentally challenged, ban't allow it, we'll put them in counseling and give them anti-depressants against their will".
Generally speaking, of course, the decision is, "Oh, we are not pleased with the way your body formed...it's unpleasant, and we can't imagine living like you do...so we grant that your mental depression is permanent and unrepairable because, well, we wouldn't want to be like you...so please die now"
what about a kid that is not technically deformed, but is just really, really ugly, who is not very intelligent, etc....do they get to kill themselves?
and then what about the really pretty girl who just sees no point in life...pretty blonde, doesn't want to live life as an object, sees humanity as a burden to the planet and doesn't wish to be a parasite on the planet, is truly unhappy with her life, etc....does she get to kill herself? Because, you know...she's so pretty...we shouldn't let that happen...