Earlier quoted context omitted.
So heroin isn't clinically addictive and one can't overdose on it?
Heroin isn't significantly more addictive than cigarettes. You can also easily overdose from nicotine, its just that this is mitigated by the relatively slow delivery mechanism, which makes it so that you get terribly sick before you could consume lethal quantities. If we can come up with an effective delivery method then heroin would be no more dangerous than cigarettes (sort of, you still can't, for example, drive…
Given that when the supply chain of heroin is disrupted the most statistically significant cause of eratic behaviour in users is that it just hurts so much I suspect its a little different to nicotine.
If you are interested in understanding drivers of addiction I would recommend looking at cases where people are forced into withdrawals.
For example: http://www.sciencedirect.com/science/article/pii/S0955395915...
Although I recall another article published ages ago (early 80s) which had an interesting economic analysis of the elasticity of heroin prices, to paraphrase, resulting from what is essentially inflicting pain on users until they will pay yur asking price.
I would love someone to draw the connections to nictonine withdrawals