Why would Amazon be in trouble for not knowing the customer has an Ethernet cable stretched across their yard? Even AT&T (Southwestern Bell) buried drops from the pedestal to the house.
Would you say the same thing if a delivery driver drove through some other cables or objects on your property and broke them despite being in a clear and nominally safe area?
because it should be able to detect and avoid any number of obstacles.
what if the next time it hits a clothes line and lands on someone?
the FAA investigates anything that might cause shit to fall out of the sky