It is a nicotine delivery method, if you choose to use nicotine. Leading up to my VSG, I have gone to zero nicotine. It is NOT smoking. No leaves are being burned, hence no tar, arsenic, benzene, etc. etc. Many think I'm splitting hairs here because of what vaping looks like, but make no mistake. It is NOT smoking.
Allow me to be frank right along with you. Nicotine is NOT a carcinogen. It is a mild stimulant, much like caffeine. There is evidence that it could slow the post-surgical healing process, which is why most docs want zero nicotine tests before doing surgery, but it's many other chemicals in cigs that cause cancer, not nicotine.
The thing is, unless you have a vested interest, you would never do your homework. Most people just take the information fed to them by main stream media as fact. The facts are much different, and I can support everything I say. I'm with you! Most don't do their due diligence because it's so much easier to criticize something that looks like smoking. It's not like they care or anything.