Well nowadays there is "someone else" (for a given definition of "someone") with a set of controls. Kids are being taught to drive in machines that literally drive themselves, and they need to learn that every decision that the self-driving computer makes ultimately falls on them as the driver. I think they were saying that this is a concept that needs to be taught, not a law that needs to be enacted.

That's not to say that a manufacturer is blameless when a FSD car careens into the side of a building at 80 mph. Just that immediate legal responsibility for the movement of a vehicle generally falls on a driver.

The concept absolutely exists in law but it’s just called… “the driver.”

There's another aviation term, "The Pilot Flying." The Pilot In Command bears the authority and responsibility. The Pilot Flying is doing the work of steering. If present, a Pilot Not Flying might help with checklists, system monitoring, navigation, radio communication, handling secondary controls like flaps and landing gear, but the Pilot Flying is in immediate control of the aircraft.

The PIC is very often not the pilot flying. I used to be a flight instructor, when teaching students who aren't yet qualified to command, I acted as Pilot In Command, but the student was the Pilot Flying as much as possible.

Autopilots have been a thing for most of aviation history. It doesn't count as a crewman. It's a piece of equipment like any radio or gauge. It is a tool at the PICs disposal. It is the PIC's job - sometimes delegated to the Pilot Flying - to monitor the autopilot and take over if it begins doing something wrong.

That's the concept that is missing with self-driving or driverless cars. Tesla drivers will sit in the driver's seat and abdicate command of the vehicle to the autopilot, or worse, cars are operating as taxis with passengers in the back seat and no one in the front seat, or with no onboard controls at all. Fully autonomously, or remotely operated by Southeast Asians who...totally have a valid American driver's license. Definitely.

Corporations love it. "Legally, the driver is responsible for the vehicle. Our car has no driver, so legally no one is responsible for the vehicle. Responsibility averted."

The concept is that anything that happens to that aircraft (or car) is the sole responsibility of the pilot. Flying into restricted airspace? If it's necessary to avoid a collision, you do it. Putting the plane down in a field? Better than hoping you can make it to a runway when your engine is out and lives are on the line. Another driver signals that you are clear to make a left turn on a congested road? Nope, because when that traffic you couldn't see hits you on the right, you're responsible for your car, their car, and all the people inside both vehicles.