Sorry for the book length post.....
Learning to play pool is very much like learning to read, as far as the process goes. In order to become a reader you must first learn and practice the fundamentals (beginning with the alphabet, what each letter looks like and how it's pronounced). Then you begin to group letters into words, then eventually you know enough words to be able to look at a sentence and comprehend something other than just a bunch of characters arranged in a line. The quality of your results is a product of the quality of your experience, the quality of the knowledge you've gained through practice and repetition.
When playing pool we first learn fundamentals (stance, grip, bridge, stroke, the basics about where the cb needs to hit the ob in order to pocket it, etc...) We practice these things, learning english and angles and how the balls roll. All of these things comprise our "alphabet" of pool knowledge. Some players even make up their own alphabet and do just fine. Anyway, we practice this stuff over and over until we are able to step up and look at a cb and ob and know how to hit it so that the ob goes to the pocket and the cb goes to where we want it to go. The quality of our results is dependent on the quality of our experience and acquired knowledge.
Now, take someone who knows the alphabet but has never learned to read, never learned enough words to be able to read an entire sentence without struggling through every word. You will need to stand by them with a dictionary and/or correct them along the way with every sentence they practice. Eventually they'll be able to piece the words together on their own, making it through entire passages with less and less guesswork.
Compare this to a fluent reader who is trying to learn how to speed read entire sentences/lines with a single glance of the eyes instead of reading one word at a time.
There are several methods one can use for learning how to speed read, but you have to already be a very good reader in order to benefit from any of these methods. You must recognize the words, know the result/solution of a group of words in order to gather meaning through a simple glance. A less skilled reader will not be able to learn speed reading without tons of extra practice because they lack the vocabulary and acquired knowledge needed to recognize every word they see, especially from only a quick glance.
This is similar to a fluent/good pool player when it comes to aiming pool shots.
They already know the solution (the shot line) as soon as they see the cb-ob relationship. This is due to experience and acquired knowledge. Any aiming method that involves sweeping or pivoting the cue to the shot line will be easier for them to incorporate because they already know the result/solution, not because the system provides the solution. In other words, they make the system fit the result they need based on their experience/knowledge. Less skilled players have to experiment with bridge placements and pivot points trying to arrive at a solution that works. After enough trial and error, it'll eventually "work itself out" as explained here,
http://www.billiardsthegame.com/offset-and-pivot-aiming-systems-395.