you forgot one thing: the onerous and burdensome regulation.
if i didn't grow my own, i would certainly want some way of knowing what i was buying aside from some stranger's word.
i would love me some taxation and regulation.
I know a guy that carries 3 different kinds, the brick, the mid, and the highgrade. I know the grower of the highgrade and go directly to him most of the time. I tell my buddy that he shouldn't even carry the brick b/c we know its from az and all that may imply. I told him I won't contribute to that violence, which is one of the main reasons I ended up at riu learning to grow my own.