I could see them as being a safety measure to keep the boats from pitch poling with the different wind speeds. If they can't change them while racing what is the big deal. Could they just have a different rudder for different wind speeds and change between races. I think it was smart for Oracle to test with adjustable winglets so they could find the best balance for conditions. The other teams may have and had the same opportunity to test with adjustable winglets. Two boats have pitch poled and flipped so far and one sailor has died if changing the winglet angle before the race helps I would be fore it.