Liquor Control Boards: An Honest Question

What do government-run liquor stores provide that a privately-owned ones cannot?

In my head, I’ve been trying to come up with a reasonable argument, both pro and con, of various liquor control boards, and aside from the profits from these stores going into state coffers, I cannot think of any added value that the government institution brings.

Price Controls? Meh. They don’t need to sell liquor in order to do that. Preventing liquor of getting into hands of those who shouldn’t? They’ve already demonstrated that they can hand that responsibility to a private industry (bars and taverns, any place that sells beer or wine). Governmental agencies can have as much or as little oversight they wish of any private liquor retail industry. So they question remains – why does the government need to sell liquor?