Apparently you did not see the 60 Mins. piece on Bezos where he demoed the drone landing on customer’s front walk, leaving the package and zipping away.
I’m with you, and probably Amazon’s lawyers, landing could prove troublesome.
That was just a publicity demo...that’s not what they are planning on doing. Only an idiot would do it that way..lol
There is no need to approach the ground other than back at the warehouse.