Yes, everyone eventually succumbs to something and dies. But it is simple fact that horrible lifestyle choices like smoking, obesity, and alcohol abuse result in chronic illness that is outrageously expensive to treat and lasts decades. Live healthy, and you stand an excellent chance of living a long life with a much shorter period of illness at the very end.
I work in healthcare (emergency medicine) and I see this stuff every day. The costs of personal lifestyle choices and the burden it puts on our healthcare system are mind boggling.
If you fail to smoke cigarettes, the odds are that a rampaging smoker will shoot you all to death.