I understand and the company used that as an excuse days ago.
I think if ya live in a rural/desert area, with lots of straight roads without many cross streets, traffic, kids, parked cars, pedestrians etc, they might work relatively safely.
But in the big population centers with thousands of variables that could possibly occur, not so much.
I think by the time they perfect a vehicle which would immediately address every situation possible, they will be prohibitively expensive.
I read it as an admission that the company is incompetent to test the product safely, and therefore, they should be sued out of the business.
I agree that the concept of a car's operating rather like a train ... straight along the line ... seems workable, but I expect that's only until the car hits an armadillo and rolls over while the passenger is asleep. Even trains have live operators who are supposed to be paying attention, and bad stuff happens when they aren't.