I don't feel like "changing" the angle is changing anything.
If the clubhead is grounded and in a static position, you can loosen that screw and spin the shaft in either direction. The clubface is doing nothing while the shaft is spinning. Once the shaft is "adjusted", you are no longer gripping the shaft where you gripped it before the change was made.
The clubface never changes, only the shaft changes when you turn it a little left or a little right, and you never grip the shaft in the same place because there is no top side or bottom side to the shaft. It's just round.