my father is 92 and has been, is eating everything you better not, so I hear you.
I on the other hand choose to not only be clean from the outside but also from the inside.
No I am not afraid of dying since we do not die. But I don't want this layer of mucus, puss and acid inside my beautiful and strong body that has kept me healthy for all these years. My body is my temple so I treat it with love and respect while enjoying cooking and eating the most wonderful dishes without mucus, puss and acid forming foods/products. And that makes me very happy and does not give me any stress or worry.
There are also smokers who were still smoking in their nineties and never a day sick in their lives so yes it's about chance as well. Cheers to chance.