Only reason we do not see Google's self driving cars on road is because of cost liability issues. Laws are yet to be written how to decide how much liability is to be covered when a company is a multi billion company and lawsuit claims billions of dollars for mental problems caused by the accident.

If they limit the liability to 200-300k per accident, like it is with human drivers and accept all the recorded video as evidence, google may go full scale with its self driving system, at least in robo taxis and high end cars since cost is still a lot (maybe around $25-30k).