I think you mean “dependency” and not “addiction.” Addiction is by definition a bad thing:

“Addiction is a neuropsychological disorder characterized by a persistent and intense urge to use a drug or engage in a behaviour that produces natural reward, despite substantial harm and other negative consequences.”

You’re right about nicotine though. It’s the delivery that’s the problem, in addition to the addictive properties which make the harm of the delivery less salient. Emphasis mine. From: https://en.wikipedia.org/wiki/Addiction?wprov=sfti1#