Perhaps it's not the right to harm ones self that's the issue. Should you have the right to manufacture, sell, and profit from harm to others? Be it environmental, oral health, lung health, or heart health, cigarettes are a net negative to any citizenry. Seems in a governments best interest to try and greatly reduce and/or eliminate this leech.

I don't mind taking away the right for my son to smoke cancer sticks. Much like I wouldn't mind making Russian roulette illegal.

Why is it anyone else’s right to take your right to smoking away?

I have to breathe your smoke and pay for your healthcare.