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Why you should hold the bow with an open grip

Today, while shooting some ends with my new bow, I finally figured out the major reason why archers are told to shoot with an open grip. I read stuff about vibration and shock etc., but I think the real reason has to do with how the string is pulled. As you pull the string you need to pull it perpendicular to the plane of the bow. If you hold the bow in a tight grip you can potentially pull the string to one side, rather than straight back. This will impart a lateral component to your arrow release, causing a lot of fish-tailing. If you use an open grip, no matter how you pull the string the bow will yaw so that the limbs are perpendicular to the pull. This will reduce fish tailing.
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