This is such a weird question. In most cases we never buy directly from the company that makes the product. And in the cases where we often do, like with Apple

This is such a weird question. In most cases we never buy directly from the company that makes the product. And in the cases where we often do, like with Apple, they sell with high margins in part to allow third party shops to have enough margins to survive. Apple wants Apple products to be sold in as many places as possible. Cutting their margins so tight that no third party seller could survive is not in their interest. There's some weird dealership laws in the US, I know. I don't think car companies can do what Apple does (except with workarounds like Tesla uses). But it's not clear that things would look very much different if it was allowed. I don't think most car brands would want their own shops, just as you generally don't buy an Asus laptop directly from an Asus shop.