Comment by akiselev

They're apples and oranges. Chips are not machined, they're etched in batches. Their "tolerances", so to speak, are limited by the wavelengths of visible or UV light they use for creating the masks and exposing the photoresist that protects the wafer from hydrofluoric acid and other etchants. There's no mechanical force involved, except to spin wafers to apply coatings and move them between each stage of the process.

Engine blocks, on the other hand, are CNC machined one at a time and the force of machining steel causes vibrations that move the cutting tools thousands of nanometers back and forth. Placing both in the same building, for example, would likely cripple the semiconductor fab. Having a machine shop in China make a one off would likely cost as much as a luxury car.