I've always thought the right handed guitar was actually left-handed. I'm a lefty and play a 'right handed" guitar, but all the dexterity needed is in the left hand (pressing the fret board in intricate ways).

For things that require two hands, like hitting a hockey puck, I think one needs to take a close look at the dynamics involved to see where the dominant dexterity is actually truly most influential over an action being taken, before you can assign it a "handedness". Maybe, they just assigned the wrong "handedness" to hockey stick holding position.