Nicotine can be just as harmless as caffeine. Personally I don't find nicotine very addictive at all, but even if it were super addictive it's all about how you consume it. [1] Nobody cares about how many people are addicted to caffeine, because the main consumption method of caffeine is pretty safe (coffee).
Caffeine is actually mixed with meth in ya ba (popular in Thailand) [2], but that doesn't mean that caffeine ruins lives. When you say that nicotine is deadly you're conflating the drug with something completely separate. It's sort of like saying that air is deadly, because it could kill you if you inject a lot of it into your veins.
At this point I'm just happy I can breathe properly.
I can smoke a cigarette or cigar socially, periodically, have done so for years, and never experience a craving. However, alcohol calls to me like Odysseus's sirens.
I have friends who are precisely the opposite: hopelessly jonesing for cigarettes, but have no problem grabbing a few beers a month with friends.
This is not merely anecdata - individual susceptibility has been documented in the literature, as well.
https://www.sciencedaily.com/releases/2017/10/171010124112.h...
my friend is trying to quit and i hope he does , his health is sub-par.