I’m not sure what you’re getting at. A dealership isn’t just a place of purchase. They facilitate test drives, let people shop around for different makes and models, do trade ins. A lot of people want to see what they’re paying for before dropping 5 figures on a single purchase.
You don't need a dealership for that, you can do it with corporate store fronts and the experience would be better for the buyer (and the seller) because the incentives are actually properly aligned.