And fwiw, years ago I did smoke. Watching a close friend waste away and die of both emphysema and cancer was enough of an encouragement for me to stop. Cold turkey. A small switch went off in my head and it simply became something I couldn't do anymore. Too much pain. Not so much hers (although that was terrible). It was everyone else's around her. And my own at losing her.
Not easy to do. It took years for me to feel I was free of it.