Experience can get one by in most things in everyday life and most things one does.
But there are times one needs to know the "in"s and out"s of something.
When I was in QA doing product testing, we added a wireless device to the communications part of the system.
From a installers point of view, they just wanted to know how to install it, the spec's/limitations of the product. From my point of view,I had to understand spread spectrum technology, how the data communications of the base product worked and the effects of the environment on the signal and then design tests for the product.
I rode a motorcycle on the street and then decided to go racing. When you start pushing things to the limit or want to increase the performance of something or someone, the more you understand on whats going on in the details is critical.
I rode a 900ss on the the street and raced one. The characteristics of each was different, even though both were basically the same bike. The race bike was able to be flicked from left to right easier than the street bike.
Why? Because, once on the track, the little details become big details and understand how all the little details affect each other is critical.
A little detail is the battery location. One the street bike, the battery is up high under the gas tank,going across the frame. On the race bike, I moved it down, next to the front cylinder(v-twin). Why? Because now that weight was located down, closer to the center line of the bike and lessen the affect of having to move a weight from one side to the other.
My street experience was only good to a point on the race track. To improve my on track performance, I had to learn about weight distribution, location of the center of gravity, swing arm angle, ride height, suspension settings, proper body position and so on. These things are not important to most street riders, but for those that want to push it and increase their level of performance, these things matter.
I believe the same is true in increasing your level of performance in pool. The more one understand the little details in shot making, the better your performance level will be. The better one will be in able to determine to decide if what they are trying to do will work or even is possible.
There is 3 cushion player that is venturing out to pocket tables. Yesterday, we played some 8-ball. After, I asked him how he knew where to put the CB to make the shot. He did not have a answer. Just trail and error. Now, this guy is a fairly good 3 cushion player, but was out of his environment.
I took a few minutes to explain how I get the CB to where I want it and I could see the lights come on.
The point is experience will do in most things, but to truly master something and truly understand something, you need to know what is going on behind the scenes and sometimes that is understanding the science that is in what you are doing.