One other aspect of the issue: When schools are involved, beancounters are always nearby.
Macs tend to be more expensive than PC-based suites; I’m generalizing a bit, but, looking at things the way purchasing and procurement people would; on the one hand you have a single-source for the hardware in Apple with FCPX, no flexibility in pricing, getting them serviced and etc. has only a few options…
… and on the other, Adobe’s NLE runs on mac or PC, So Does Blackmagic’s Resolve, and purchasing people have way more options for sourcing the hardware on the PC side, maybe making commodity buys at a discount. They can find hundreds of contractors and vendors on the PC support side, heck their own in-house IT people would probably be tasked, truth be told. There are plenty of PC-oriented places out there where macs are looked on as exotic curiosities.
Apple’s not helping in terms of making it easy for institutional purchasers to order and get bids.