Well... that was perhaps 1 cent worth, but that's as far as I'll go with that.
I would strongly suggest you read at least the first 20 or 25 pages. That presents the initial problem and then the solutions. Once you get up to Dvaps whole tobacco extract and guinea pig testing you should get a handle on the main idea.
At this point no one is questioning if people are getting nicotine out of e-liquid, it's other missing elements in the purified type nicotine that make it unsatisfactory for many of us. As current or former smokers we would all do well to try and understand what's going on.
Dvaps blog is also a good read to get you up to speed.