On the other hand, by having Amazon control the to-the-door experience, that gives them incredible granular controls over how things are done, when, by whom, and how they do it, including how they are supposed to treat you at the door (if you're there), what to say, etc. etc. As well as any additional things that could come in the future.
For example, what about a 5-minute tutorial for a new product you just ordered?
These are just the tip of the iceberg that Amazon could do with this.