Medicine != Magic.
Contrary to what they show on TV and the movies, there is risk in every activity (especially medicine) people are somewhat different from one another and any time you you go cutting into, sticking stuff in, and/or removing stuff there is a certain amount of risk.
However, on the plus side, had I been born 100 years ago I would have been dead for 5 years now. With current medicine, I am still alive and should remain the way for some time.