There are always going to be exclusions. I do believe in genes. I have friends that eat fast food every day and seem to be ok. Never even come close to eating a vegetable. Other people wouldn't last a year doing it.
Just like if I drive my car 100 mph every day, I might live. But there is a higher likelihood that eventually it will kill me. So I keep it under 80 mph.
My dad smoked 3 packs of cigarettes a day and had his first heart attack at 45. Dead at 53. His sister who never smoked lived to 78. (see how this works).
Again - if smoking is ok, not only have your female loved ones smoke when they are pregnant but bring their newborns into bars and pool rooms with smoking, let em breath it all in to those new lungs of theirs. When you don't have time to go to the pool room, just light up a cigarette and blow the smoke in their face. Ain't gonna hurt them - so says Dick and Neil.
p.s. I'm here now and working in Phoenix for over the next month. I'll take a ball from the HOF San Jose Dick.