There are people who are sick, I'm not just talking in the head sick, but other ailments that cause an unbearable amount of pain, all you can feel is pain and death seems like a good way out. Unless you've felt it, you don't know why anybody would want to die. If you've tasted even a few seconds of it, you understand it and just feel sympathy for them. There are probably cures for everything that have been suppressed, and without an available cure for things which cause so much pain, people will naturally look to death as a way to end the pain.