> Mainstream medical science along with common sense point to nicotine being addictive and bad for you.

Gwern's article cites many, many peer reviewed journal articles (aka mainstream medical science) about how nicotine's addictiveness is overblown, and you're citing three tweets.

Common sense points to you being clueless in all of your writing, even though I haven't read it, and I don't really feel the need to interrogate that view.