There's one important part about risk management though. If your Waymo does crash, the company is liable for it, and there's no one to shift the blame onto. If a human driver crashes, that's who you can shift liability onto.
Same with any company that employs AI agents. Sure they can work 24/7, but every mistake they make the company will be liable for (or the AI seller). With humans, their fraud, their cheating, their deception, can all be wiped off the company and onto the individual