These aiming systems are unheard of in snooker. Much more important that you can deliver the cue in a straight line without unintentional side. Pool and snooker are about "feel" and there's no getting around it!
You are quite right there DangerousDave.
I would advise anyone wishing to play better snooker to first of all forget about aiming systems, and concentrate on developing an accurate cueing technique in order to consistently strike the ball accurately.
Snooker is indeed all about "touch" and "feel", and endless practice in order that you can immediately recognize the potting angles when you take your shot, and delivering the cue through accurately in order to successfully achieve the pot.
Best wishes.
Alan.