This response does not actually address the thrust of my comment. How is Apple able to put out very high quality hardware, even as it uses the same few factories that others use?
It is the customers of these factories that provide the designs and dictate the quality of manufacturing and tolerances that they want, no?
Isn't that because (modern Apple Silicon) Macs are vertically integrated? The Wintel stack is a Frankenstein and nobody has particularly good quality. Dell, HP, Alienware, Razer, Samsung, Sony etc. are generally all crap these days too. The Lenovo X series is quite a bit better than most American lines, but still not particularly impressive in terms of build. Microsoft's Surface Book line looks well designed but had a bunch of heating and power problems. Even my Intel Mac frequently has problems. My M1 one, on the other hand, is amazing, so far ahead of every other computer I've ever had.
On the Wintel side, I've had better luck with small biz machines (ThinkPad, not Lenovo, or Latitude) plus upgrades in home warranty, but honestly those break down too. They're just easier to fix.
It is the customers of these factories that provide the designs and dictate the quality of manufacturing and tolerances that they want, no?