Uh, but the robots actually DO it. And they aren't programmed with "astronomical" amounts of information.
Yup. And the surface they leave is rough, requiring buffing and polishing at least.
The original point was the amount of information in a car. A real car. Which means you must numerically describe the shiny surface of the metal. The multiple layers of the paint. And result in something measurably identical to a real car.
THAT is numerically impossible.
The reason I'm making that comparison is I'm studying how to do software 3D rendering now, and I'm recognizing the serious limitations involved.
Vectors dear fellow, vectors. If raster information was used, it would be enormous.