Maybe it is just the cigarette companies trying to scare everybody. Creating false drama so that they will stay away, people will do anything if they see competition getting stronger and bigger.
I would say let him try vaping with your vape and see if he likes it. My parents tried to stop me from smoking when I was 16,but hey as you said at that age you know everything. It was only January this year when I realized that my fingers are yellow,teeth stained and clothes smelled horrible...