The reason most other companies don't worry about that is two-fold: culture, and costs. Apple has a culture, built top-down, that quality is paramount. While this seems to have started to decay a bit on the software side, mostly due to the size of the systems they are dealing with, and the need to support multiple software and hardware platforms (MacOS, iOS, iPad, Watch, iPhone, etc.), it is still going strong on the hardware side.
But the most demanding issue is cost. PCs are now a commodity. The margins in hardware are sustainable--barely. Therefore, every dollar (yen, yuan, etc.) invested in hardware design beyond the reference implementation provided by Arm, Intel, Nvidia, etc., is less money to the bottom line. And with lots of competition and rapidly iterating developments occurring at the chip and board level, the big gains in performance are driven by the chip manufacturers, not by the hardware platform providers like Dell, HP, Lenovo, etc.
Apple has managed to side-step that whole issue by providing an integrated platform that they completely control--more so now with the huge success of the Apple Silicon chips. This allows them to build compelling integrated solutions that don't run into the reliability problems posed by huge numbers of 3rd-party driver developers, support for add-in cards and other multi-provider issues. These are all things people complain about--the inability to upgrade or service their Apple hardware--but it provides a much more controlled environment, and allows Apple to spend more time working on all those attention-to-detail-items you mentioned, rather than testing, troubleshooting, and supporting an ever-growing plethora of hardware interopation issues.
Apple hardware costs a bit more (not a huge amount), and has a lot fewer upgrade or customization options, but what you get for that is a more bullet-proof solution overall. And it means Apple engineers and designers have more time to make sure that the devices are light, well balanced, quiet, and durable. It's a trade-off, to be sure, but so far the numbers are shifting in Apple's favor--something that seems shocking if you were around in the '90s when Apple's certain demise was commuted due to a huge investment by it's then arch-rival, Microsoft.