Let me offer an alternative narrative:
Unlucky person has bad experience with BB (which is always a possibility), they buy another one. Whether or not that’s an expensive one has no bearing (ha!) on its lifespan, but people feel their choice of an expensive BB is affirmed when it lasts more than a year. Ergo they form the opinion OEM BB = bad, Expensive BB = good.
In the alternate reality where they bought an OEM BB, things are also tickedy-boo (but they don’t experience that).
It’s just probability, and yeah that may be down to SRAM QC being slightly worse than Hope. But the price difference is insane *.
I ended up on hope for a gxp xx chain set. The cheap bbs lasted weeks (in one case one ride!)
Well, the one that lasted a ride was clearly faulty or installed incorrectly. I’ve had GXP BBs fail quickly after a few months. I’ve also just replaced a SRAM OEM one that has been on my MTB since 2015.
*N.B. I’m not taking into account the £50 fitting charge LOL.