Earlier quoted context omitted.
You're overstating the dropping thing. I've had shipments with plenty of rough deliveries and rougher trips in the truck on the way to be delivered. Being carried in the air and lightly dropped from 10 or 20 feet off the ground isn't going to hurt my Blu-Ray copy of Captain America: Civil War. I think when you guys say "cities," you're talking about some kind of nonexistent arcology of mile-high cyberpunk buildings w…
Yea, a blu-ray movie isn't hurt by a 20 foot drop. A blu-ray player is. Most packages are not made for shocks, just constant pressure (think the difference between someone punching you and someone sitting on you). Also, I'd bet that what you consider a safe range for drone operation and what a federal aviation safety official (or non-US equivalent) considers safe are two totally different animals.
I can walk down to my sidewalk and have a half-ton vehicle going 45 mph drive within 20 feet of me in a moment. There is no question in my mind that that circumstance is much more dangerous than any delivery drone you care to send coming within half that distance. We live with some very generous tolerances for risk.
But to speak to the Blu-Ray player being hurt by the drop, sure, but what makes you think every possible item to be delivered would need to be accounted for in modeling a service like this? I assume there's a narrow band of items that make good candidates, and I'm not interested in hypothetical problems with delivering items that aren't good candidates in the first place.