Apple are using precision optics to select the parts with the right machining tolerances to fit together to minimise interface issues. Those parts are machined to very tight tolerances in comparison to a car.
I feel like you're trivialising the complexities of a phone production line.
No, I'm just saying that large-scale car factories are bigger, louder and takes up more space than consumer electronics factories. Apple does invest quite a bit in its production facilities, but most other manufacturers of consumer electronics don't.
I feel like you're trivialising the complexities of a phone production line.