It's also conceivable that with his compelling story of kidney failure with his life saved by transplantation, Hitler gets admitted to art school, creating beautiful landscape paintings for the rest of his life. At the same time, the person who cures cancer may also accidentally create a virus that destroys every single living cell on earth within one week after its accidental release into the environment. The only person surviving would be a brain emulation prototype which copies itself, rebuilding human society such that nobody dies or feels pain anymore.