Why does everyone pick just on smoking? I took up smoking just to spite a society trying to tell me how to live.
No. Way. That's like shooting yourself to spite the gun grabbers.
You can always find exceptions to the rule, there are pack-a-day smokers who live to 100, sure. If you feel lucky, go right ahead. But noone can deny that the chances of getting cancer from smoking is much greater than if you don't.
I always think back to Morton Downey Jr. who was the most in-your-face smoker around. But once he got the lung cancer that ultimately killed him, he cursed the day he ever lit up his first cigarette, and he spent his remaining years begging people to quit, or not to start in the first place.