I honestly don't see the concern. The system as it has been described creates a door code which is good for only a couple seconds after verifying that the delivery driver is who they say they are and that they are delivering a package the customer ordered. The entire things is video and audio recorded for the customer to watch.

If you were of a mind to rob a house, there are infinite number of easier ways to break in to other houses where you won't be so easily identified. A house electronically locked and recorded would be at the bottom of your list. You wouldn't even have an incentive to open the door up wide enough to look inside for fear that some customer watching their video complains about you.