Conventional Golf Instruction is quite often successful in teaching students the WHAT:
The Positions, Angles, Physics and Geometry of Golf Swing Mechanics.

But it fails to teach the HOW: The human physiology, the muscular system, the skeletal system, the brain functions etc. It is not very effective to attempt to learn by simply knowing the end result – you must figure out HOW to get there. Golf biomechanics helps explain this by enabling students to become aware of their kinesthetics (body movement).
Much like performing an exercise in the gym, a golf student must use the correct form and have the awareness of the basic muscles and bones that are being activated.