I would guess this falls into the category of coaches and teachers/trainers of sports. Many coaches in sports are not a top player of their game but they have the knack of teaching or knowing the methods to be successful. I would think cuemakers could be all over the board in terms of talent but they have a good comprehension of the game.
I coach girls volleyball and I know some of the guys and gals I coach against would not stand a chance on the court agianst me, but I have to think they were at least an average player at one time and now just have the knack for teaching the skills of the game.
I coach girls volleyball and I know some of the guys and gals I coach against would not stand a chance on the court agianst me, but I have to think they were at least an average player at one time and now just have the knack for teaching the skills of the game.