Sure, but my point is that EVERYTHING you buy has to end up at your house somehow. If you buy it from a store, it has to be shipped to the store, and then picked up by you. If you you buy it online, it is shipped to a distribution center, and then delivered to you. No matter what, we have to get the item to the person who is buying it.
I am just wondering what the actual carbon footprints of the different methods are.
I get it. My point is it's rational to expect it to all be baked into the price. In your example I suspect that the cost of individuals driving to stores dominates, and this is in fact baked into the cost of driving, but individuals are largely blind to the operating costs of driving.