Earlier quoted context omitted.
None of your arguments tell me why this kind of relationship should be enforced by law, only why you might want to buy from a dealer and not a manufacturer directly.
Not now. But his arguments might tell you why the laws were created in the first place. Protection of consumers like you and me. I honestly I can't see a good reason for labor unions to exist anymore either, but they're still around and have plenty of politicians on their side.
As "lower prices" tells you, the customer was not considered in the equation.