I wouldn't really called it a solved problem when waymo with lidar is crashing into physical objects
NHTSA stated that the crashes “involved collisions with clearly visible objects that a competent driver would be expected to avoid.” The agency is continuing its investigation.
It'd probably be better to say that Lidar is the path to solving these problems, or a tool that can help solve it. But not solved.
Just because you see a car working perfectly, doesn't mean it always is working perfectly.