I have noticed that many(not all) golf teachers, especially if they teach full time, have a difficult time actually playing the game. Some of this may be simply due to the fact that they are not playing the game very much, but are teaching.
There does seem to be a phenomenon among many golf teachers... that once they get into teaching, they have trouble playing. I know, and have played with several of them. They may have the occasional good day.
There are exceptions, of course. Bob Toski, for example, was/is probably one of the best players, that also taught a lot. A friend of mine that knows him says he is a FEEL teacher, that is, he moves the students around a lot, and tries to get them to FEEL certain things. I believe he PLAYS the same way. I think that would be called a RIGHT BRAIN teacher and player.
WHAT IS THE CAUSE AND CURE FOR THIS? NOT, STOP TEACHING AND START PLAYING!