Here's what I'm saying when I say "everyone aims by feel:"
I've come to the conclusion that there are no aiming systems that can put you on the exact correct shot line. I believe this because systems like CTE are discrete, meaning if you follow them exactly to the letter, the object ball can only go in a number of finite directions. There are several respected physicists who say the exact same thing, and since these people also have expertise in billiards, I think their opinion is worth listening to.
Who are these physicists? I thought they were engineers. How have they fared in professional play? How are they recognized in the world of professional instructors who give lessons to pros in person as opposed to the internet?
On the flip side, I have yet to meet anybody who can explain in regular english how CTE works... not one. So although I'd like there to be a system that puts you on the exact shot line, I do not believe it exists.
That's your problem for being deaf and dumb and not seeing the main man, Stan Shuffet in person.
What I do believe is that the exact correct shot line can only be found through trial and error, which I called "feel."
What this is called is REINVENTING THE WHEEL WHEN IT'S DONE BY TRIAL AND ERROR. EVERYTHING OUT THERE HAS ALREADY BEEN CALCULATED THROUGH TRIAL AND ERROR INTO A SYSTEM! THEY ALREADY EXIST!
To answer your question, you cannot really tell a person how to aim, other than something like "ghost ball plus allow for throw." Put an object ball 1 diamond off the side rail and 2 diamonds off the foot rail. Put the cue ball 4 diamonds up table from there and have a beginner shoot this shot 50 times a day. He will gain a sense of where to aim in order to pocket the shot. I call this shooting by feel, and EVERYBODY who can play at all plays like this. How can I be so confident? 1) because, like I said above, there are no systems that can put you on the shot line, and 2) I can do it easily and naturally, and I'm certainly no big fish. If I can do it, every pro can, too. There are no shots where I "just can't see the shot and need something to fall back on." Aiming is almost a complete non issue. Let me say this -- a player may have a particular "system" like line up the side of the tip with the center of the cue ball, or whatever. In the end, it is his "feel" that makes the shot. I consider the rest of it to be just a pre shot routine, something done the same way every time to provide consistency. I guess for some it is helpful to do some kind of trick thing like put the tip on the cloth first, or edge of the shaft somewhere.
BLAH, BLAH, BLAH and BLAH, BLAH, BLAH. Then become the GREATEST INSTRUCTOR OF YOUR NON-SYSTEM.
The real key to all this, of course, is the stroke. It is a fallacy to believe that a player can follow a set of instructions like CTE and start pocketing balls without regard to the quality of their stroke. I never hear Stan mention the importance of a great stroke. Most people cannot deliver the cue straight and on the intended line of aim. Delivering the cue straight and on the correct line = 90 or 95% of the battle. Aiming correctly = 5 or 10%, IMO. Those who do not have a reasonably perfect stroke will not understand this.
Now you can incorporate stroke training. More power to you.
I always like the analogy of using the Iron Willie stroke machine. If you could magically turn your body into an Iron Willie machine, you'd probably never miss again. To answer your other question, the pro's are so good (in addition to other things, of course) because they have superior strokes. I can aim as well as Efren, and you probably can, too, but the stroke makes the difference.