It is hurtful physically and mentally to force a body built for and with the desire to exercise and eat well to adopt sloth and gluttony. To force one built for homosexuality to adopt heterosexuality. To make an agoraphobic a park ranger or a claustrophobic to work in a mine. None of these things would kill someone... quickly. It could be argued that stress will shorten their lives or weaken their decision making skills and make crucial moments more likely to produce failure. But definitely not kill them directly or immediately like hunger. It would be however a very distasteful thing to have to endure.

If I am claustrophobic and the whole time I know you we never do anything in small spaces. You hate small spaces. We talk about this at length as well as my claustrophobia. We do things in wide open spaces all the time and we both love it and it's great. Then as soon as our lives really get entrenched you won't leave the basement and I have to spend nearly completely all my time there... It is going to be taxing in the extreme. Imagine being trapped in that damn basement and the sweats and the shakes and the doubt and fear and anxiety and did that fucking wall move?! And there is your best friend, in the basement, with you, first person you'd want there with you if you have to be there, helping you get through being in the basement while insisting that the basement is the only place you can see them.

Needs are needs. They don't make sense. We don't make sense. We are these wierd, meat, Rube Goldbergian automatons thrown together by luck and chance. Yes, someone can be loved without sex. But it is hard to be stuck in the basement when the body screams "run, jump, open sky!". That feeling is consuming.