But you don't.
And Nvidia knows that you do not and knows that you will pay the prices. They would be leaving money on the table by selling cheaper. Brand loyalty is very real among us fleshbags. It's like Apple, people will happily pay 30% extra for the "brand" - whatever that means.
Maybe Nvidia should abandon board partners and auction cards direct from it's site. They wouldn't leave any money on the table that way.