Sounds like a B&M he needs to stay out of. There are many ways to vape, and not everyone likes or should sub-ohm just as not everyone will like carto tanks or cisco attys. None of us find what we prefer though if we only try one thing.
We need options, but they are no good unless people have the chance to try them.
I ran into this at a vape shop that I worked at briefly.
A guy came in telling us that he drove a dump truck for 12 hours a day and needed a mod that was tough and would have a long battery life.
The manager sold him a Vamo (because the shops profit margin on that was higher) instead of an MVP. The long battery life and passthrough feature on the MVP would have been perfect for the customers needs, especially with a 5 dollar 12v to 5v usb adapter in his cigarette lighter.
Needless to say, I didnt stay there for long.