You might be right for smokers who transition to vaping. I would bet money that you are right. When my patients ask me, I tell them my guess, and I am emphatic that it is a guess. We will know the right answer at some point.

However, the concern is that nicotine use is on the upswing among young people (edit: previous nonsmokers) for the first time in many years. If vaping is anything short of harmless, which I think we must presume it is, then this is a brewing problem.