“For example, a 20 year old who is totally fit dies in his sleep. Or a 40 year old develops a “turbo cancer” and dies a couple of months later.”
I will submit that if a 20yo dies in his sleep he was not, in fact, totally fit, otherwise he wouldn’t have died. Cancer, rapid fire cancer, is possible at *any* age, from leukemia children to brain tumor young adults, to hodgkin’s lymphoma…