That kind of remote control opens up the possibility - maliciously or accidentally, likely or unlikely - for every Waymo in the fleet to abruptly stop, regardless of whether it's safe to do so. That scenario is orders of magnitude worse than "sometimes a Waymo gets lost in a parking lot and it takes a thirty second call to fix it".
Ideally, in the future you would have to expressly press some button to send an OTP to someone you wanted to allow to control your car, with fine-grained permissions.
Will that future happen? Probably not, and we'll probably see extreme corpgov oversight and mass reduction in individual freedom in return for convenience.
Anyway, I was only responding to OP's claim that support for remote access capabilities could lead to an exploit: There's already remote access capabilities in these cars.
It's riding in a robot with no reliable safety fencing. This is the mayhem these companies are subjecting the general public to.
He didn't even miss his flight.
Like 90% of our news. Even the weather is like all drama "atmospheric cyclone tsunami" and ends up as light rain with some flooding, like last year.
And a super typhoon on vacation.