I've seen videos of these waymo lots and it is far and away the most idiotic system designed by people who are probably rather intelligent.
The problem is insisting that a charging depot for autonomous cars should look and behave as a traditional car park. It should be a fully enclosed garage, to keep out the rifraff, with a palletized racking system. When there is vacancy, the car would be signaled to drive onto the pallet, and the robot in the garage slots it into an available spot, silently. When the charge is complete, the car is put back out to the road and oriented such that it doesn't need to back out.
It could be built underground, above ground or adjacent to a traditional car garage. The neighborhood would be insulated from equipment noise, car noise, and it would occupy a fraction of the real estate.