I’m wondering the same when I’m watching disassembly videos. So much of that stuff is obviously deliberately made to be unrepairable. Like charging ports soldered onto the motherboard. Never mind glued in batteries that you almost can’t replace without destroying the screen. Soft screws that fall apart. And little details too, like layouts pointlessly changing with every model so you can’t use your knowledge from a year ago, or use the same parts even for the most trivial things.
No sane designer can desire that.
It comes from the top. CEOs, marketing, sales. Sell more shit. Convince people to buy more shit by inconveniencing them.