Before anyone defends the ghost ball method anymore, try what I said to try in one of my other posts.
As for other aiming systems, yes, I believe they can be used as a crutch for amatuers and beginners. For intermediate and above, aiming systems become more of a distraction than a tool. Most professional players admit they do not use aiming systems, most of them never did use an aiming system. It's all feel, memory, experience, etc.
If a pool teacher can get his students to shoot the CB exactly to wherever they aim each time, that is much more important than teaching them how to aim at cut shots. If a player cannot get the CB to go where he aims at consistently, teaching an aiming system is pointless. Sure he knows how to aim, but the question is can he execute?
As for other aiming systems, yes, I believe they can be used as a crutch for amatuers and beginners. For intermediate and above, aiming systems become more of a distraction than a tool. Most professional players admit they do not use aiming systems, most of them never did use an aiming system. It's all feel, memory, experience, etc.
If a pool teacher can get his students to shoot the CB exactly to wherever they aim each time, that is much more important than teaching them how to aim at cut shots. If a player cannot get the CB to go where he aims at consistently, teaching an aiming system is pointless. Sure he knows how to aim, but the question is can he execute?