Before we let people make choices about smoking, I'd rather let them do heroin or cocaine. At least that does not force me to inhale their smoke. But as a more

Before we let people make choices about smoking, I'd rather let them do heroin or cocaine. At least that does not force me to inhale their smoke. But as a more general answer, we (as society) always make trade-offs with letting people make their own choices, and forbidding behavior for the better of society. The boundaries will always be somewhat arbitrary. That said, the economic costs of smoking to society is significant and there are some corporations that essentially make a killing on it (don't get me started on the anti-science propaganda that they funded. If people want to smoke tobacco in their own home, sure let them grow their own, so at least there is not a corporation who tries to peddle smoking to children in order to improve their profits.