Patrick - you are probably right, but yet I dare say that the Sneads and Nelsons and Mangrums and Hogans and before them the Hagens and Sarazens, all of whom played through or were born during the Depression and who had hard-scrabbled upbringings were concerned about/needed to make money as much as and even more so than the JN's of the later generations. And yet to a man, watching the old footage, you saw them step up to the tee box, put the ball down, step up, take a look, and swing -- all in about 20 seconds, shot after shot, round after round, and eyeballing just about every shot, distance-wise. And it strikes me that it's not a coincidence that all their swings were unique -- each of them found their swings, and trusted them precisely because they'd found them (and not had them drilled into them by instructors), and they made those old persimmons and blades work for them, not the other way around -- including when it came to distance control through feel. It was when teaching and technology took over that the game slowed down -- and not surprisingly: if your confidence and your game is dependent on that technology (to bomb the ball 310 yards down the fairway, any fairway) and the training (to get into very narrowly prescribed "positions"), your mind and spirit are not where they should; you are thinking about golf rather than playing it.
At least that's the way it seem to me, in my (necessarily) humble opinion.