Yes, I hate to admit I am/was someone that assumed nicotine is bad, but Gwern's article is fascinating and well researched. This was a poor hill to die on for this article.

No nicotine is actually basically bad. Basically all the scientific evidence we have on nicotine products is that it’s bad and addictive. It is a stimulant though, which means it can, potentially, help people with conditions like ADHD. But then again, we have real medicine for those, that we know works.

All the people who think nicotine is not that bad have clearly not used it long enough, and aren’t addicted enough. There does come a point where it will feel like your bones are trying to escape your body when you dare relinquish from nicotine. Then, it will be clear it is bad.

If there are any doubts nicotine is bad, simply ask nicotine users. And by that I mean, not the people who used Zyn once or twice to study for an exam.