Testing autonomous cars in areas with inclement weather would be a good indicator of progress. So far no autonomous car can remain autonomous in heavy rain or moderate snow, and no car can predict if a kid standing on the sidewalk will dash in front of the car all of a sudden. Or if the thing being blown across the road is a plastic bag or something more substantial. Or where to drive if road markings have worn out or otherwise became invisible, or how to avoid a pothole, etc, etc. All that stuff which you do without thinking, all of it is unsolved.
Wake me up when they’re testing L5 in Alaska in winter, using a car with no steering wheel. Then I might consider trusting my life to it.
So what you are saying, it takes time to perfect the technology? How is that the same as "no one has a foggiest clue how to do it"? There are many people with lots of clues.
Would you care to cite any sources for that? Sounds like something a couch expert would say. Have you talked to every Waymo engineer?