I know some really bad drivers that have almost no 'accidents', but have caused/nearly caused many. The cut off others, get confused in traffic and make wrong decisions etc...
Waymos, by media attention at least, have a habit of confusion and other behaviour that is highly undesired (one example going around a roundabout constantly) but that doesn't qualify as a 'crash'.
I experience Waymo cars pretty much every time I drive somewhere in San Francisco (somewhat frequent since I live there). Out of hundreds of encounters with cars I can only think of a single instance where I thought, "what is that things doing?!"... And in that case it was a very busy 5 way intersection where most of the human driven cars were themselves violating some rule trying to get around turning vehicles and such. When I need a ride, I can also say I'm only using Waymo unless I going somewhere like the airport where they don't go; my experience in this regard is I feel much more secure in the Waymo than with Lyft or Uber.