There are many official justifications for these restrictions, but the main one is this: “Customers do not know what is good for them.” They do not know what products to buy, what prices to pay, or what arrangements to negotiate with respect to return and replacement. Customers are in fact woefully ignorant of what they really need, so the state enters the marketplace to restrict what customers are legally allowed to purchase. The idea here is that state officials know what customers really need as distinguished from what customers are willing to pay for.