As an example, this (1) is how the manual looks for a ~1970-1974 stereo record player I have. You have diagrams of the boards and lists of parts as in individual caps, etc.
We should strive to move in that direction, not away from it. Permanently locked bootloaders, DRM for componets, etc. are a move in the oposite direction.
To move the overton window even a little bit towards where it was before, the demands have to be disproportionate. I say those demands are still reasonable. We should demand that any device and any component in any device be second source-able (just like AMD was a second source for early x86 chips). And for that matter since I am from Europe, any component should be second source-able from Europe. If IP transfers worked for China, they should work elsewhere.
(1) https://www.manualslib.com/manual/1012672/Pioneer-C-5600dfv....