It doesn't "explain" it, he doesn't work for Apple nor know their true intentions. It's entirely his conjecture from the POV of a reverse-engineer. In any case, his conclusion certainly doesn't align with a "less access is better" mentality:
> Advocate for Apple to provide access to their calibration re-provisioning processes instead [...] Them not providing those tools sucks and is anti-repair.
By that rationale, Marcan might actually support iFixit's decision here.
I'm not sure what is his take on iFixit decision, but he does provide some good explanations why some things are the way they are. I don't expect that Apple will officially provide better info, so that is probably the best we have. At least I haven't seen anyone with intimate knowledge of apple hw and sw provide a better or contradicting information.
