I think this is about software optimization, making video files work as seamlessly and lag-less as possible on Mac, and to achieve that, you need to have your own controlled ecosystem an make sure everything works perfect on it. 64 Bit is the future and lets be honest, ProRes is king.
And seriously, enough arguments about Mac vs. PC its just down to preference at this point. don't like Mac? Get a PC. Want both, build yourself a hackintosh that has bookable Windows and stop complaining.
So many whiny techies that end up doing just fine in a years time.