I've never not exercised just because I was a smoker. Addictions are hard to break but a great number of addicts, of any kind, are human beings first, not ghosts in a shell who only have one side or do one thing. Are you actually reducing everyone to a stereotypical junkie? I've been a cyclist for 5 years, I was runner and a boxer before that. Did smoking hamper me? Of course it did. Was exercise futile or dangerous? Of course not. Everybody can benefit from exercise.

ps: I never coughed until I stopped smoking. That is what is supposed to happen because your lungs clear and everything starts to function better.

People can certainly see the woods and make decisions about their lives every day. It sounds like you can't see people for a your limited world view.