Interesting results. If one were to have damage to one hand or wrist, it would be a good thing if the other remaining arm could be used. Of course, training would enable such a thing. For example, it might be a good idea to learn to shoot with boths hands even though one hand is usually dominant.
I also have to wonder about the stress to the wrist, forearm and hand from repeated use in chopping chores. There have been reports that some of the old timers had rotator cuff problems later in life, and many of them used an axe for a living. Or could it be that normal wear and grind just eventually hunts us all down?