Actually that is exactly the right thing to do! If something goes wrong when Autopilot is on, I think the manufacturer have to prove that it was a human error and not otherwise.
We don't want to say "no mistakes allowed" though, that would be going too far.
It's good for manufacturers to err on on the side of limited capabilities to keep things safer, but we don't want them to err too far in that direction. And if they're providing ongoing insurance with no revenue, that's an incentive to be overly restrictive.
