Respectfully, it feels as if you're not reading my or anyone else's posts in this thread. Yes, I do not advise someone start vaping nicotine if they're non-smokers. From everything I understand, there really isn't more harm in applying a nicotine patch a day compared to drinking a cup of coffee a day, assuming average/recommended doses.
Yes, nicotine can be addictive. Caffeine can also be addictive. Yes, nicotine can cause certain health problems - as can caffeine. I'm surprised you worked at a company that sold nicotine products and yet have such a moral panic mentality around a fairly mundane, mild cholinergic stimulant out there.
Smoking is terrible for one's health, but smoking cannabis is possibly not much healthier than smoking tobacco; people just smoke tobacco far more frequently per day than cannabis, typically. At least one study shows cannabis smoke is actually more likely to cause lung cancer than tobacco smoke when taking that into consideration. Odds are burning and inhaling the leaves of many other kinds of plants will have similar risks. This is not a defense of tobacco smoke on my part but rather an attack against any kind of combustion-based smoking period.