Because smokers aren&#x27;t nicotine addicts like heroin users are heroin addicts.<p>One of the big effects of nicotine is that it reinforces habit formation. Smokers have a giant pile of situations where the unthinkingly obvious thing to do is to pull out a cigarette and start smoking it. Reprogramming the brain by replacing the action with &quot;pull out an e-cig and start vaping&quot; is much easier to do than not having a thing to do. If you don&#x27;t have something else to replace the act with, you&#x27;re probably going to do something like &quot;think about how much you want a cigarette&quot;