But unavoidable no-win scenarios exist on the road. "What does the vehicle do?" is a reasonable question to ask.
In the case of bike lane traffic or heavy pedestrians, if no avoidance options are available, your suggestion could easily restrict traffic to sub 10 mph. (E.g., to be able to stop with minimum impact if a pedestrian suddenly darted into the street.)
(I am glad to see that in this video, the Waymo crosses a double-yellow, using a dead zone between the two sides of the road to avoid the collision, thus bending the rules to avoid the hit, which is great.)