Also now we have a century worth of experience to apply to deciding to add new vehicles to our environment.
And finally for the most part cars, trucks etc are primarily fixed routes - roads. We know where they are, there's planning and committees around design and disruption before they are set in place.
Drones move in a 3 dimensional space, with no set routes, and very few no fly zones.
Basically imagine a moped that can fly over your property or circle where you live looking for an address.
Not to even mention the privacy issues, most cars are still lacking in cameras, or scanning technology. Delivery drones will need that stuff to be standard.
Then don't look up in a couple of years when SpaceX has HUNDREDS of satellites ruining the night sky.
https://www.nytimes.com/2019/06/01/science/starlink-spacex-a...
The last thing I want is to add to the power lines, airplanes, etc. with the visual noise when I'm on my deck trying to enjoy nature.
Further, Amazon is a major player in the advertising space now. I'd be surprised if at some point these weren't leveraged to display ads in some format. I'm a marketer by trade, but personally that's a line I don't want crossed.