It's a lot more basic than that. Everyone can steal game knowledge by just copying what other people do, but the ability of progamers to click quickly and accurately and efficiently divide their attention and context switch between multiple things is way harder to copy. If you've never seen the first person view of a Starcraft 1 progamer, you should watch this: https://www.youtube.com/watch?v=JfAU2lw6BrQ#t=6m8s