The pro market is too small for Apple to care about it. Instead of trying to get hundreds or even thousands of video professionals to buy new Macs, they can nail the pro-sumer market and sell to hundreds of thousands of hobbyists like me.
This little tidbit comes from Sachin Agarwal, founder and CEO of Posterous, and a long time employee of Apple working on Final Cut Pro.
Why Apple built Final Cut Pro X | Sachin’s Posterous