A golf ball does not care how pure your swing feels. It only obeys contact geometry, and a one-millimeter change in club path can rewrite that geometry enough to erase 10–20 yards without any change in perceived effort. What feels identical to the player is, to the ball, a new set of vectors in three-dimensional space.
The harsh truth is that path controls spin axis. Shift the path just one millimeter more in-to-out or out-to-in and you subtly change the horizontal gear effect and the face-to-path relationship, tilting the spin axis a few degrees. That small tilt converts forward momentum into curvature and excess spin, lowering ball speed transfer, or smash factor, even though clubhead speed and impact location barely move on a launch monitor.
Distance loss then becomes a compound tax. A tiny path shift can move impact a fraction toward the heel or toe, increasing oblique impact and glancing blow characteristics, which raises spin loft and cuts effective coefficient of restitution. The ball launches on a slightly less efficient trajectory, bleeds energy through curvature, and lands shorter, leaving the golfer convinced nothing changed except the result.
