A delivery person will probably not do a roundtrip between the store and your house, just for your groceries. They'll have an optimized route for doing a dozen

A delivery person will probably not do a roundtrip between the store and your house, just for your groceries. They'll have an optimized route for doing a dozen deliveries at once, and amortize the ecological / social cost across all of them. It's a bit like a bus vs. a car. They're not equal, even if they both drive on the same roads.