You misunderstand. You are addressing an anti-smoker.
Well, putting more nicotine in cigarettes would encourage smokers to smoke less, exchanging less harmful nicotine for far more harmful other ingredients. Note that cigarette manufacturers try to strictly limit the amount of nicotine in cigarettes to encourage smokers to smoke more cigarettes.
An odd secret of nicotine is that because tobacco chewers have higher levels longer in their bodies, that even after they quit chewing tobacco, they are not prone to become addicted to cigarettes.