Even ignoring the police officers, aren’t there clear rules for what to do when traffic lights are turned off?

In Germany, an inactive traffic light means that traffic control reverts to any present traffic signs (stop/yield/priority road). If none are present, the default rules for entering an intersection apply (which in Germany are to yield to any traffic coming from your right).

All of those rules already must be implemented for autonomous driving so why the hell couldn’t they implement a hierarchy?