Interesting that Waymo now operates just fine in SF fog, and is expanding to Seattle (rain) and Denver (snow and ice).
A system that requires a "higher level" handler is not full self driving.
Which is why an autonomous car company that is responsible and prioritizes safety would never call their SAE Level 4 vehicle "full self-driving".
And that's why it's so irresponsible and dangerous for Tesla to continue using that marketing hype term for their SAE Level 2 system.
If the vehicle has a collision, who's ultimately responsible? That person (or computer) is the driver.
If a Waymo hits a pole for example, the software has a bug. It wasn't the responsibility of a remote assistant to monitor the environment in real time and prevent the accident, so we call the computer the driver.
If we put a safety driver in the seat and run the same software that hits the same pole, it was the human who didn't meet their responsibility to prevent the accident. Therefore, they're the driver.