Right, but we all don't have to commit suicide.
Thats what smokers do every time they light up a cancer stick.
not really. It is possible to smoke for a few years, even a decade or two, and then quit and live a long life free of disease.
The problem is, just how do you know where the "point of no return is"? It's bound to be different for everyone.
I had an uncle That never smoked a day in his life, and he died in his nineties of what they used to call "stiff lung". Or sometimes "farmer's lung"....basically emphasema caused by a lifetime of breathing fumes from pesticides and dust while working in the feilds.
I had a grandpa die at 88 of a stroke and he smoked from the age of 12 till he quit in his early sixties. He also inhaled asbestos practically on a daily basis for over 30 years.
I've had other relatives die of lung cancer even though they never smoked or had jobs exposing them to risks.