We're also constantly moving the goalposts on Apple. The iPhone 11 had no public repair manuals and only special authorized repair centers could purchase genuine parts or perform the "System Configuration" pairing step.
With the iPhone 12, 13, and SE we suddenly we got public repair manuals[0] and public access to genuine parts[1]. The "System Configuration" step still exists, but it's accessible to anyone and requires chating[2] with Apple/SPOT (their self repair subcontractor).
Now the new iPhone 14 has been expensively re-engineered to make self repair easier. But you're saying because the same self-serve "System Configuration" step is required for some components it's all moot? Let's take a win when we get one. It could still be better, but the trend is definitely moving in the right direction.
edit: Also not all repairs require motherboard pairing step, albeit the most common ones do. But you can replace the iPhone SE camera, taptic engine, SIM tray, and speaker without any System Configuration step. See the the SE repair manual [0].
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[0] https://manuals.info.apple.com/MANUALS/2000/MA2049/en_US/iph...