"Systems underlie every phenomenon, and are everywhere one looks for them. They are limited only by the observer’s capacity to comprehend the complexity of the observed entity, item or phenomenon."
According to this definition we can only see systems if we're willing to look for them.
Does this mean if you're not willing to look for the systems in pool they are, in effect, invisible? Maybe this is why some players can't see what's been right in front of their eyes all along.....hmmmm, this certainly does make sense, doesn't it?
I do not think that a formal named system of any kind is vital to playing great pool. I firmly believe that you could lock yourself into a room with a table and figure out everything that is possible on a pool table and train yourself to execute it perfectly.
I do believe that you would probably make some discoveries while doing that which would lead to you viewing the shots systematically/automatically rather than consciously choosing what to do on each shot.
I think that any time you are given knowledge then you have been given a shortcut because that is something you don't have to discover on your own. You can then skip right to testing out that knowledge and building on it.
That's why we as a species thrive. By copying each other and innovating on those copies. It's why Shane Van Boening, when asked why he does a certain thing says, "I just do it because Bustamante did it." And then goes on to put 40 hours of practice on top of it to insure that he can do it every time.