I assume price would be the major factor. Also, as someone who knows nothing about e-bikes, but who knows "DJI makes good cheap drones and gimbals", they'd be pretty high on my list of "probably makes an ok product" without searching.
Air isn't perfectly clean or dry, either. I would bet that DJI has some clue as to how to protect the most sensitive components in a way that can survive _lots_ of vibration.
Clearly not unsolvable but I'd wait for some 1 year use reviews before even thinking about it.
This is a solid strategy for just about any new company/product-line.
Even with years of experience in drones, DJI had an insane amount of (mostly positive) change between the first and second generation of mavic drone.