The author makes the assumption that tobacco was stigmatized by a moral crusade-- a key mistake. Even if it was correct, anything rebellious is cool, so this argument holds no water.
The real reason smoking is out is obvious! Have you ever smelled a smoker's breath? Their clothes? Ever had smoke blown in your face? Ever sat down on a couch covered months of acquired ash? Ever had an ashtray spilled on or near you? Stepped on a cigarette butt? Ever seen a woman who's been chain-smoking for 10 years?