Say you could navigate the package from the warehouse to a persons property, how would you deliver the package while eliminating the risk of injury? My thought

Say you could navigate the package from the warehouse to a persons property, how would you deliver the package while eliminating the risk of injury? My thought would be to have the drone phone home so that a real human could perform/oversee this last stage of delivery. In cities you could see if delivering to a rooftop is feasible to avoid having to negotiate sidewalks/people. A lot of obstacles in the way here but I would love to see this succeed. I envision a world where a table sized gas powered version of this could carry more packages futher.