LOL. Imagine the amount of plastic created by Netflix DVD. How many people you can rent one DVD to and how much plastic is in one DVD compared to the packaging in your trash can right now.
And the postal service, to a rough approximation, already goes by every mailbox every day. Adding an envelope has a smaller impact than a bicycle delivery.
Would a bicycle delivery have been okay? How about 1/10th of the impact of a bicycle delivery?
It takes a lot of people to make internet connections work too.