It’s much hard standing on the right and kicking across your body with your left foot. You end up turning your body away from dummy half, can’t see the pressure coming from marker, can’t step if you decide to runThe left foot kickers or lack of right foot kickers is a coincidence and would have to be unusual. I am of the school that it doesn't make any difference as a good kick is a good kick regardless. Many would disagree with me though.