Study the lines on the picture. Broken down left wrist. Clubface facing the ground. This is called an open position. And notice the angle of the right wrist. Very dominate. Ready to cast that club.

In comparison with the Wristfirm in place. Left wrist square at the top which means you'll have a square clubface position. Much shorter shaft angle. And notice the now subordinate right hand. Just along for the ride till impact.