That's a great analogy. One that I will use in my next 'discussion' with some family members and close friends. I've gotten thru almost all the 'but you're still using nicotine', and 'dangerous chemical' comments, and the money thing is about to be the next full force 'point' they'll try to use.
I don't know about you but there are very few people in my life that I have to answer to. The rest can go have a long walk off a short pier as far as any comments about me vaping that I do in my space.