There are lots of surgeons who smoke, who don't harass their kids for smoking. 
My parents and grandparents smoked, offering the excuse that they knew people who lived till their 90's and were heavy smokers and drank a lot. So lung cancer, emphysema, lip cancer and deadly alcohol problems killed most of them. 
There is enough evidence to show that allowing high schools to have football,  promoting those kids to playing college football, and then letting the elites play at the pro level is at best dangerous,  and at worst, child abuse.
We make kids wear helmets when riding a bike, then let them bash their brains for sport...
I am no doctor, but letting your kids take risks on the football field for a gladiator sport is just insane.
 
Hugh Massengill, Eugene Oregon