It’s simple. If your right hip turns deep enough (up and away from ball) and you have a lateral shift with the lower body to initiate the downswing, that gives you room and time to get the right arm in front of the body and you don’t get stuck.
That’s why these whole restrict the hip turn and swing in a barrel concepts are so bad.
Go try and make a swing where you restrict hip turn and don’t allow lateral hip movement on downswing…and keep your right arm in front of you. Exactly, you can’t. Block and flip city.
The goal of the golf swing is to limit excess movement while not restricting free movement.
That bold statement should be the beginning and end of every book and article on the golf swing.