So smoking isn't something that hurts only the user. It's like drunk driving, it could hurt anyone on the road who is unlucky enough to be in the wrong place at the wrong time. Drunk drivers are scum who deserve to be kicked in the throat. And smokers are no different. If it really hurt no one else, I wouldn't care, but it does, more than a bunch of middle schoolers who don't understand basic economics like yourselves will understand for many years.
Luckily, smokers are increasingly becoming pariahs in our society, with it being banned from nearly all public places. Sadly, it is not yet legal for me to stab you in the lungs yet (what? I'm just speeding up the process. Still your choice, I'm just helping it along) but give it time.
Anyway, rest assured that when you're lying in a bed unable to breathe except by vomiting at the age of 45, my smug, healthy ass will be running circles around your deathbed. And while you try in vain to call for help (since you voice no longer works) as you suffer your fifth heart attack, rest assured that your wife wouldn't have been able to hear you anyway, as she'll be too busy taking my dick up her ass.