I think that a big problem is that in this age of "golf tips", people are often looking for a quick fix, a magic bullet, and TGM isn't that. TGM requires a little commitment, a little work, and often a little help. But, as many on this board know, the benefits are well worth the effort.
I WENT TO Ben Doyle a hooker, I haven't hit two consecutive hooks in 18 years.
He has an interesting perspective on things. As I'm sure you know, he worked with Ben for about a year, ending in mid/late 2003. He says that the component variations Ben was giving him - maximum trigger delay, horizontal hinging, snap release, pitch elbow - all caused him to hit vicious hooks. And he said that the better of a player you were, the more those "sought-after" variations would hurt your game.
I can go deeper into this if you'd like, but I'm afraid of what it will degrade into.
I know ALL ABOUT teaching PGA Tour players...I still teach one from time to time (seems like I mess him up every May, doesn't it), and have taught several over the years.
Every time the issue of TOUR players comes up in my inner circle, I am reminded of old Joesph Stopa. Ole Joe use to work with me at ProTech Golf. A golf store outside of New Orleans that was YEARS ahead of its time.
ProTech had Classic clubs for sale or would refinish or rework them for you, TOUR ISSUE clubs for the same, did any sort of complex repair as well as basic stuff (I was hired by them in January of 1982 becuase of my wood refinishing talents). We did frequency matching, were a DAVE PELZ Putting Studio, and had indoor lessons with the help of a Mitsubishi Analyzer by a young up and coming instructor named Manzella.
Anyway, Stan Stopa was the proprietor, a player of some repute, who had played in more Tour Schools than Mac O'Grady and was still playing at the time as well as working as the Head Professional at Audubon Golf Club (where he still is).
Anyhoo, Stan would come in to the store about 3:30 and look at all the work we had for him and he would say "Yikes."
Ole Joe would then say:
"You want a REPAIR SHOP, you got a REPAIR SHOP!"
I say:
"You want a Tour Player, you got a TOUR Player."
Having said all of that, maximum trigger delay, horizontal hinging, snap release, pitch elbow are components that WILL WORK ON SOME STUDENTS, just not all (of course).
He are my %'s on who can do them effectively
(I provide these nubers free of charge as a service to my TGM pals).