That's probably not the thing to tell a parent whose kid just made a dent and a black smudge on a MachE. I don't want to over index on the "think of the kids" argument, but we don't take driving seriously enough. Wikipedia says:
Motor vehicle crashes are the leading cause of preventable death for people aged 5–22, and the second most common cause for ages 23–67.
Okay, that was insensitive of me.
But yes, what you say is the logical consequence (except I'm not kidding about grief and impatience).
My point really is that if we want our kids not to get horribly injured or killed, we can't just focus on "other people" making bad decisions like driving drunk. We have to acknowledge that we've collectively built a system that requires people to put each other in danger with cars, and we have to think about how to change that. Cars bring a lot of benefits like autonomy and decentralization, how do we keep that but kill fewer people?
I believe the answer is far more complicated than it seems and in practice having the cars stay still might have been the safest option any of the parties could agree on (Waymo's office, the city traffic people, state regulators, etc).
There are people thinking this stuff out and those cars can 100% pull over automatically but an explicit choice was made not to do so for safety.