The business is that your smoke is affecting other people. You are free to smoke in your own private space. Smoking in public space used by others can be controlled
You being in a public space affects my health because you use up oxygen, which I need to survive, and spew out carbon dioxide, which is fatal to me, and others. As a matter of fact, it is more dangerous than cigarette smoke. Can I pass a law to keep you from doing either, or both, in public?
Before you start assuming anything about me and making a fool of yourself, I do not smoke, and never have. I would love, on a personal and selfish level, to see cigarettes totally banned so I would never have to smell the foul things again. That said, I know that my freedom demands that I support the rights of others who I find offensive, which includes those who smoke. If more people understood this we would not have to worry so much about the idiots who want to take away our freedoms.
You are on the side of the tyrants here.