Kind of funny that it is assumed that a human-operated vehicle would be more prompt in getting out of the way. Yesterday, walking in my city I saw an ambulance stuck at an intersection for over a minute because of confused drivers and a police vehicle blocking the road.
I think the fact that the vehicles stop is better. Emergency vehicles can use any lane even for opposite traffic - so go around them.
Meanwhile, Teslas seem to target emergency vehicles for ramming at max speed.