Hmmm...I can see where you are coming from, but I don`t know if we have the same understanding of an aiming system.
In my eyes it is just something to find the (exact) contact point for the cue ball on the object ball.
You describe it as much more, that influences your stance, stroke and so on...maybe...I don´t know...more of a pre shot system?
You say, that most of the pool players take the aiming part for granted and I agree, that they shouldn`t, but I also think, that aiming is something very natural. We aim everyday and all the time...if we reach for something, if we catch something, if we try to put a fork in our mouth and not in our eyes, if we try to fill a glas...same goes for the pool table I guess.
I remember a discussion I had with some of my clubmates over aiming, bad eyesight, fundamentals etc. a few yer ago.
Coincidentally the best player in our club (multiple tournament winner, medals in European Championships) was just practicing on the table next to us, so we made a little experiment.
One of us had a little laserpointer on his keychain and so we used it to find the hit point on the objectball and then let the semipro execute the shot.
99% of the time even the worst of us amateur players got it right immediately, which showed us that our aiming was spot on...and made obvious, that we all were missing shots because of other things we did wrong.
Anyway, I guess it doesn`t matter, if this systems help your aiming, or your mindset or both. If you find something that helps your game, use it