... but, humans also get in accidents all the time. If the goal of self-driving cars is to do *better* than the humans, stopping at what humans can achieve (with "cameras (eyes) only"), safety-wise, isn't good enough. If you want "safer than human", as Google evidently does, you need LIDAR
How about we get as good as humans first, and then we can talk about being better than humans. Sorry, even Waymo is not there yet. The claim is that safety performance is due to a lack of being able to see and more sensors is the solution. If we take that statement at face value (ie lacking data), then additional cameras could just as easily overcome the limitation as additional sensing modalities. But most accidents caused by humans are due to judgement errors, not an inability to see, so one could just as easily argue that super-human performance should be achievable without additional sensors. Incidentally, all approaches to self-driving (including Tesla’s) use way more sensors than humans possess, so if more sensors is all that is needed, we should have achieved super-human performance a long time ago.
Look, let’s be straight. When Waymo started their experiment in self-driving more than 20 years ago, cameras were not as good as they are today, embedded computers were not as powerful, there was a limit to how much custom hardware design they could do, power consumption was an issue, and computer vision was in its infancy. The only feasible approach at that time was to use a rich sensor array coupled with large data heuristics—maps that tell the car which lane to be in when going through an intersection, which light corresponds to the lane, which intersections have stop signs or yield signs, which intersections have no turn on red, what is the speed limit, which intersections should be avoided entirely because they are too complex, etc—to lower the burden of perception and decision-making that had to be made directly by the car in real time. In other words, the current Waymo driver and all of the engineering that was put into it is a sunk cost that they are not going to back out of now. If they were starting fresh today, I would be willing to bet that they would not take the same approach.