[...] and come up with a response like this: "but if I could make an infinite number of perfect copies of my car while retaining my own copy, at low or no cost, what would be my incentive to use a system designed to make me lose control over my car or any other property?"
Yes! Why try to create an artificial scarcity when you have just advanced far enough technologically, that the scarcity (need for physical medium in this case) is removed? That's taking a huge step backwards.
Wouldn't it be great - like in the parent poster's example - if there weren't even scarcity on ordinary physical products? Isn't that where things are/should be going? (I know: you'll always need the energy to create the matter to create the products, but still...)