This make perfect sense to me, from decades of experience in the semiconductor industry.From producing automotive parts and products for nearly 2 decades I can tell you that there is a difference in the parts that are produced to build a new vehicle VS the parts that go into a box for repair parts, regardless of who's name is on the box or the part.
Parts that go into the build of a new vehicle are delivered under strict performance criteria. Basically, if a wheel bearing or a glove box latch fails in a new vehicle the manufacturer is responsible to make the vehicle manufacturer whole. That means paying for parts and labor to replace every single failed part out there.
Parts made for stock to repair existing vehicles carry no such performance clause.
When a big customer has a field component failure, it has a negative effect on their reputation, so they often have procedures in place to have the component returned back to the vendor under a traceable RMA(Return Material Authorization) # for root cause failure analysis - and they demand a corrective action plan from said vendor, to guarantee an acceptably low statistical failure rate, with financial incentives in place.
On the other hand - retail part sales has no such procedures or motivations in place.
You just rely on statistical quality control methods to give you a good quality part.