I just don’t see that restricting repairs to OEM parts as a problem. Does your “aftermarket” display have the same performance requirements the original? How do you know? Why didn’t you buy the part from Apple?The problem is that companies have been actively removing or making the option to use aftermarket parts more limited. Have you not been paying attention to this discussion at all? Seriously. It's like you want to argue for the sake of arguing rather than discussing the actual issue. That's why everyone is happy Apple is actually making things more repairable. But they have been doing it in a dumb way that makes it more difficult to do so without apples blessing which is why there is still criticism.
To add... if a feature is broken because apple decides to detect an aftermarket display and just choose to restrict 120Hz down to 60Hz, that doesn't count as me "breaking" a feature. Apple broke it because they don't want you buying aftermarket parts. If I accidentally jam my screwdriver into my camera module while repairing the screen and now the camera stops working, then yes it would be on me in that case; but no one is suggesting apple should be responsible for you messing up your self repair.