Its hard to die because of the present society and survival instinct. Your body is equipped with countermeasures to ensure your survival, even if you don't want to survive. Like vomiting when you ingest something toxic or when you aren't getting enough air you have a gasp reflex. The society is also another one to blame, its so inhumane how they force us to stay alive as long as we are fit enough to work. They don't even bother trying to make better therapeutical sources or even just making the psych wards at least a little bit more humane. Its disgusting, I really hope they change someday, become more open minded, maybe. You can't expect the body to change its ways because of evolution over thousands of years but i really hope people change their ways.