I loved Kevins post.
Its a question of playing vs understanding the exact science. Understanding exactly the d plane does NOT equal great ballflight.
I doubt Keegan Bradley was thinking d plane or science when he was busy spitting all over the place in the playoff.
I hope he stays unconscious-that guy gets in a zone he looks like he has some good instinct.
I think being a player is a lot different from being a coach in terms of needs to understand the science-the player need only know what works for him and feel is not real so some strange things might work for good players.
Being in a zone is way more important than understanding the physics and science-thats the job of the coach.
I don't agree completely. Sure for someone of my capabilities (14 hdc) the D-Plane doesn't make much of a difference to my shots but knowing why a shot did something is important no matter your capabilities as a golfer. If you still think the ball starts in the direction of the club path (see Lee's comment I've quoted) then you give yourself the wrong feedback!
I remember trying to learn to hit a draw/fade around a tree or something and I was following the common advice from golf books (see Lee). I thought I was completely useless because I was hitting it always straight into the tree. Now I know why.
As soon as you use the ball flight as feedback to change something in your swing (e.g. club path, face angle etc) you need to know the D-plane etc. If you just adjust your aim (e.g. ball goes left so I aim more right with the whole swing) you might get away with ignorance.