Because sometimes people so actually feel that way.
Sometimes your life feels like it's caving in on you.
Sometimes people really do feel like they don't want
to exist, like they want to just curl up in a ball, and
go into that place between life and death. Saying
"I don't want to exist" isn't saying "I want to die".
It's saying "I wish that, for the time being, I could go
somewhere and not have to feel". I don't think there's
anything wrong with that. And if you don't know how
it feels to feel this way, then you have no place to judge
anyone who does.