Before the pigpile on Dr Chipin gets too big, let me offer that I think his approach will work FOR SOME PEOPLE and UP TO A POINT (notice the emphases). I more or less followed this approach for many years, starting with Hogan and then Pelz for the short game. I got down under a 10 pretty easily with Hogan (thanks to natural ability, I guess, because I never took lessons or practiced too much). Learning Pelz's approach to the short game, and more intense practice) got me down to about a 5. But that's as far as I could get.
To get any better required someone else to look at my swing. A knowledgeable person. A hands-on person. Someone who could look at my swing and identify things that I had no awareness I was doing wrong. I was a notorious flipper who could muddle through because of a decent short game. But until I got the right person who could explain what to do in a way I could understand, I could never hope to improve my ballstriking to the point to get down to scratch.
For other people learning the game, the voyage will no doubt be different. But please don't get hung up and resort to name-calling when someone "newish" comes on here and offers a different opinion. Who knows, there may in fact be some truth in what they say.