How can you play your best golf? With mechanics or principal based instruction?

For about the last 50 years, people have been taught the golf swing through mechanics; infinite mechanics, highly specific mechanics. People have been taught to put their hands on the stick, the club, in a very, very specific way. Not only the positions of each finger, but the pressure of each finger. This is also true about the stance, the posture, the backswing, the downswing, impact, follow through, and any other place in the swing we can find with ultra-slow motion video cameras. All these mechanics in order to copy some great player