TGM is not a method, as Homer Kelley and Yoda would have it anyways.
Others may try to make it so, but that was never Mr Kelleys intention.
OB
Yep. The spirit of TGM is that there's no one way to swing a golf club and hit it effectively. I get the feeling some teacher, and from the sounds of it I can guess who, probably erroneously told him that TGM is one method of hitting along with some other erroneous stuff about TGM as well.
'For those who believe, no explanation is necessary. For those who don't believe, no explanation will do.' - an old saying