Counterpoint: A lot of people that smoke want to stop smoking. A lot of people would more easily stop smoking if it was banned or not so easily available.

Also from the title of the article it seems that this would never apply to people that already smoke legally. The idea is that you set a minimum age and then you increase it every year. Meaning that in 100 years smoking is banned for everyone. But nobody was never banned from smoking when they were legal before. They were just never allowed to. So it prevents young people from picking up the habit.