Windup in FED

[DG]

A FED pitcher who steps on the rubber with both hands to his side, and brings both together in front and stops, has balked. This "highly technical balk" is routinely ignored because none of the coaches know this rule (no complaints). But once a FED pitcher reaches this position legally (ie bring one hand up first, stop, and then the other), he can step off the rubber, if he does it correctly. So why would we not call a "highly technical balk" and then call a balk on a move that is not a balk if done correctly?