Sorry, I guess I wasn't clear.
The reason people switch to a different type of club or change their swing is because they think it will improve their game.
It makes no sense for those same people to then claim that the change they made wasn't done because of any improvement it offers.
Right. Meenman probably would have improved spending that time with a normal putter. But he probably bought the new one, and spent hours with that one instead of his old one, because he thought in the end he would putt better with the anchoring.