But Steel, it is an avoidable risk. The hardships of logging and crab fishing, albeit I am speaking from a position of ignorance on these particular professions, seem like they are inherent to the job. One can have a bar or restaurant without smoking. It is done quite often, as you have pointed out yourself.
As far as likening smoking bans, which would be in "public" spaces only, and prohibition, they are two different matters. Prohibition was the outlawing of drinking based on its immoral consequences, and was seen as an opportunity to weaken the German immigrants/ population during the World Wars.
In the case of a "public" spaces ban, there would still be plenty of opportunity for smokers to damage their own health, it would just be in places where they could not ruin others'. It is not as much a question of rights, as it is a question of motives, as far as I am concerned. If it is really the succombing to a habit that many people who smoke claim it is, then why is it so important to do it in public. Why not just smoke privately?
Another side to this matter that I would like to get feedback on just out of curiosity, is what about those who smoke and drive? If I am in my own car behind a smoker, I can very distinctly and disgustingly smell the smoke. It is a private space that I occupy, and I have no choice but to be behind that smoker on the road. Do the same rules apply? Am I required to not have my windows down and my ventilation system off, or should the smoker not be allowed to have their own window open? At what point do you draw the line?