It's far from the worst way, because if humans are visually blinded by the sun or snow or rain they will generally slowdown and expect the cars around them to d

It's far from the worst way, because if humans are visually blinded by the sun or snow or rain they will generally slowdown and expect the cars around them to do the same. Predictability especially around failure cases is a very important feature. Most human drivers have no idea about the failure modes of lidar/radar.