As needed for what? Good safety?
Anecdotes and small sample examples tell us almost nothing about safety at scale.
According to Waymo:
Unless there are legitimate criticisms of Waymo’s safety data (none I have seen here, but maybe there are some?), there is no basis to question Waymo’s overall safety record with anecdotes.
That would be like recommending a medication for everyone based on one person’s experience (we do clinical trials instead).
It’s not statistically valid.