Apple obviously subcontracts a lot of its manufacturing, and that is very similar to what most automobile companies do with parts: The parts are manufactured for them, but they are specific to that car and not sold to other manufacturers. OTOH, a tyre is a tyre is a trye in most cases, just as most of Intel’s chips are sold to anybody who is prepared to place an order.
I’m not making any specific point, just suggesting we be clear about what we mean when drawing comparisons between designing CPUs and outsourcing part or all of the manufacture of an automobile.
It's still made of standard components like the webcam and processor, but beyond some electronics it's all designed in-house. And the electronics may not stay standard on the low end, though I don't see them competing with Intel's chips in the Pro lineup.
Ever owned a Japanese car? Heard of (Nippon-)Denso?
You would be astonished how many bits of a car is subcontracted. What the auto manufacturer typically focuses on is engine design (at the mechanical level), chassis design and suspension topology. Most things that "bolt on" are made by somebody else.
For good or bad, this is no longer how it works. Entire subassemblys are outsourced.
I had a chance to visit it before they stopped the tours. The most impressive part was the plant where they took in a huge chunk of steel and heated it red hot, then repeatedly rolled it until it was thin, then rolled it up.