Not all bad outcomes are the result of malpractice. Most are due to disease processes, trauma, or poor health choices.
On a somewhat related note, I find it amazing that juries STILL find in favor of plaintiffs in tobacco related illnesses! Older folks, veterans who got cigs in their field rations (courtesy of tobacco companies and the military) are one thing. Someone who began smoking in the modern era of warnings on the cigarette packs is another. At what point are people responsible for their own decisions?