Using people who are 'trying to quit smoking and using vaping as a mechanism' is a poor measure of determining the addictivity of vaping because people are already trying to quit.
Personally, I quit 'light smoking' with vaping rather easily.
But then I took up vaping for about a year, and quitting was brutally hard. I was not even a heavy vaper. It consumed my entire body.
Quitting smoking I would get 'pangs' or 'acute' points where I wanted to have a cigarette - if I could get past that, it would be fine. With vaping ... it was like a constant pain. I think this was related to the nature of usage.
And I was using a log mg vape, I could have easily moved up.
Vaping is a really, really bad idea. Though the nicotine addiction is not nearly so hazardous alone, it's far worse or addicting than say, a coffee addiction - particularly for young people this is a bad idea.