Again, the main issue is that these things can cause problems with nobody is in the car. It shouldn't even be a debate. Emergency services should have a key that unlocks them and allows them to be commandeered. Everyone inside is being filmed all the time, so anyone going for a joyride is being watched, the car could be shut down remotely, and the person could trivially charged with a number of felonies, and then that access key could be removed.

If Waymo can't play well with emergency services, then they've got long term sustainability problems.