note that you're confusing selling with ability. it's one thing for the state to say they can regulate and tax a sale, but to use your dubious analogy, this is

note that you're confusing selling with ability. it's one thing for the state to say they can regulate and tax a sale, but to use your dubious analogy, this is more like the state saying I can't have my neighbour over for a (free) dinner because I need a license in food preparation and it has to happen in a rented location.