If you're a smoker, it's worth a lot to the government. If you smoke, they will put a lot of effort into keeping you alive and keeping you smoking.
If you don't smoke, well, you're not worth the cost of all those tests that are automatically applied when the doctor can tick the 'smoker' box. You don't pay enough tax, you see?
Only smoking causes cancer now. You nonsmokers can't possibly have it.
Keep that antismoking rhetoric coming, Righteous. It's good news for smokers.