Ye it is a bad idea. I mean, I've worked in the auto industry as a ECU programmer and multiple times during uncommitted code development I made self acceleration bugs. It is really easy to mess up.
And steering going full left kills you in ways the brakes and gas can't.
After I left I heard that they removed the key as kill switch too for some stupid reason.
It makes for an easy horror movie plot: car gets hacked or a sensor gets confused, and kills the occupants who can't override the Airbus-like automation lacking "direct law" or anything resembling a manual backup.
And steering going full left kills you in ways the brakes and gas can't.
After I left I heard that they removed the key as kill switch too for some stupid reason.