What do you aim at in pool? Do you aim at the object ball, the pocket, the cue ball, the shadows, the lights? What is your primary target?
The object ball, or some spot outside it.
Remember an important, and often over-looked fact - the cue ball is always the primary target because it's the only thing we physically contact - we don't effect the object ball, or the pocket directly.
Sure
In the same way that the front and rear sight on a pistol are the "primary targets" on the range. The cueball and cue work the same way(sort of) as these sights. You need to get them lined up, then point them at something. If you are staring at the front sight only you will hit nothing. On the final forward swing of the cue all the people I've ever talked with aim either at the object ball, or in some rare cases: The line formed by the cue pointing into the cueball contact point. They don't ever look at the cueball only, as far as I've heard.
This is true no matter the distance, the speed, the spin, the angle, etc. Another reason "there are no easy shots or hard shots," because the target is actually where the tip connects to the cue ball at impact.
You can't be serious! Of course there are hard and easy shots. Agree that one should probably put more effort into the easy shots than most people do and maybe be less apprehensive about the hard shots, but that is where the agreement ends.
If we don't hit the cue ball where we're aiming, it's not possible to hit the object ball as planned.
Obviously, but if you are grossly mishitting the cueball it is not an aiming issue! You are either incorrectly aligned (stance, psr issue) or have a crooked stroke (stroke issue).
The object ball acts as a "mirrored" reflection of now we influence the cue ball. When we put left spin on the cue ball, it puts right spin on the object ball, when we put under-spin on the cue ball, it puts over-spin on the object ball etc.
NO IT DOESN'T, It is true that you can transfer spin onto the object ball, but this transfer is extremely inefficient! You don't even come close to be able to call this a mirrored reflection! Not only that but it is extremely dependent on cut angles etc...
The cue ball is always the target and in every case we have to hit the cue ball precisely where we're aiming.
We're really not "aiming" at the object ball, we align to it in such a way that, when we hit the cue ball where we intend, the object ball (as a result) goes where we desire (in the final target which is the pocket or area of the table for a safety).