Earlier quoted context omitted.
This is definitely a point which needs more exploring. Seems to me most damage from smoking is all the crap in smoking. The chemical nicotine - by itself - transiently raises BP, feels nice, and that's about it. It's also only a part of the addictiveness of smoking. Probably a small part, as everyone I know who has consumed nicotine in any form has no trouble without it if they vape, but often shows discomfort/restle…
I've been a long-time smoker, and at least for me, nicotine alone does absolutely nothing to alleviate cravings. Gum, patches, lozenges, vaping, etc. do zero to alleviate my craving for a cigarette. I'm not discounting that nicotine is addictive (I'm in no position to say), but there's got to be something else in tobacco that is part of the addiction.
For me the addiction was partly psychological around the form factor. Using "light sabre" style vapes didn't work. However I was able to wean myself off smokes using realistic e-cigs (which I also eventually quit).