> This choice, like many choices involving vices or other intentional deviations from happiness vs wellbeing, are too often assumed to be made in ignorance.

Smoking happens to be a vice that has particularly noticeable side-effects on the rest of society. If you lived alone, had an adequate ventilation system (which does not distribute your smoke to your neighbors), and only smoked in your own house, I doubt there would be many complaints. The problems start when you have a family, or when you go outside where others now have to deal with your smoke.