It's also the cost of those decisions would have quite the impact on the investment in R&D which is already bonkers as it is.
A lot of people try to attribute some human aspect to a large multinational (as they are mostly just sociopaths controlled by shareholders in a sense), but technology-wise it's often just "it made sense for us at our scale".
Same with the weird USB-C PD controllers that are 'almost normal' but then specialised for Apple; it's not that they want to make it hard to repair, use custom software with or patent it and screw with other companies.. it just makes sense to change that part instead of changing another part. At scale, that is a choice you have, but also a choice you must make in such an implementation. This is of course not exclusive to Apple, a lot of the really high quantity mass produced electronics contain slightly modified versions of existing parts because that turns out to be cheaper/more reliable/better fit-to-spec than modifying the rest of the design around an existing part.
This is one of the baffling things about calculators or toy electronics (for light and sound effects) in the same vein; modifying an ancient chip with very crude software on a single-sided extra thin older style PCB material with no silk screen and only partial solder mask with a die-on-PCB with wire bonding and epoxy blob... all to make the assembly 3 cents instead of 4 cents, and reduce the lack of connections to make that 3 cent assembly have less possibilities of defects and causing less of a multi-thousand-cent service process to be activated (swap in a store, callcenter, website, email etc). Every time you get one less customer to call about a crappy firetruck where the lights stopped flashing in a 3 cent assembly is a huge win. This is of course an extreme example, more complicated hardware and software extrapolates quite extremely from there.
Oddly enough, some of those practises are implemented at a much less impactful scale in HP and Dell desktops where they might have one large non-standard PCB hosting all the normal PC components but also all the DC-DC converters, front I/O and on-board WiFi. It makes almost no sense at all to do that, but the reduced number of connectors apparently makes the products cheaper to support, last longer and since people don't upgrade them anyway they are often just 'used up' and thrown away. That last part is bad of course but something that a design-for-manufacture department is unlikely to care about or mitigate using a trade-in or recycling program (which often just ends up meaning: ship the trash to china or Africa and let them deal with it).
The amount of details and their impact at this scale is astounding. Add custom silicon and you're almost in a new dimension.