But why compare a cancer patient to a heart attack patient? What about smokers that die of heart disease, which they are more likely to get? What about non-smok

But why compare a cancer patient to a heart attack patient? What about smokers that die of heart disease, which they are more likely to get? What about non-smokers that die of cancer at 80 after a decade of chemo? Or the elderly that die at 95 after a 20 year battle with dementia?