Earlier quoted context omitted.
> I would like someone to do a "Years of life saved" calculation that tallies the expected years save by switching smokers to vaping balanced against those who were attracted by vaping who eventually went to smoking. My guess is even with the new entrants the years of life saved would be extraordinary. My understanding is entire high schools are getting addicted to vaping, where before smoking was a relatively minor…
So what's the harm of vaping? As far as I know, there is some evidence of harm, but it compares very favorably to smoking. It's a different class. To talk about "years of life lost" is quite off from what I know about it. And I never vaped, just smoked.
It gets a pass because of it's relationship with smoking, giving them a believable reason to keep the nicotine, but if I started putting nicotine in bottled water there would be a class action in a week.