Yep that's the same with WC forms, the chambering of the hand is in no way meant to be used in actual fighting application. Just used to set the shoulders and keep the other hand idle while you concentrate on the main movement. That's what I thought, still I hate how some Karate schools actually expect you to chamber in sparring. McDojos in their purest form. Although I've seen some Kyokushin guys chamber punches when the guy is on the ground.