God, I just have to share a little experience that not too long ago happened to me, relating with what you said about oculus and repairability.
So, ol' monkeyfun had a quest 2 controller grip button break. From gentle, ordinary gripping. And on the same day as fixing an unrelated problem in another controller. Tragedy!
Naturally this loser went to fix it. No guides? Oh well, at least she could see 3rd party 3D printed parts online for sale.
Might as well disassemble it to see how broken the part is, to know what to order. Whipped out tools, started disassem-- aaaaaaand it broke.
Not only was there a terribly placed ribbon cable made very difficult to access, not only were tons of parts inconsistently either held in by the lightest friction or intense nearly glued-together forces or strange catches, but the precise intersection of these aspects (and a ribbon cable that was seemingly stuck to the connector on just one pin) meant that when a disassembly step caused the controller to spontaneously fall apart into a few pieces, it was so forceful that it damaged that ribbon cable.
AAAAAAAAAAA!!!!
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For what it's worth, I anyway discovered that the way the part broke would need me to extract an embedded piece of metal anyway and make some repairs to another piece of plastic, so it was never going to end in success.
But it really made me appreciate just how terribly designed those controllers are for repair. Even the component that broke was... designed to bend a piece of plastic repeatedly from what I could tell, rather than say just having a small metal spring.
So user-hostile.