Lefties Don't Just Turn The Other Cheek?

Michelle Malkin notes a new theory about why some people are left-handed:

There must, therefore, be some hidden advantage to being left-handed that counteracts the risks, but the problem for biologists was trying to work out what this advantage was. One idea is that, in the days when arguments were resolved by hand-to-hand combat, being left-handed gave people the benefit of surprise against right-handers. This advantage, however, would only have persisted if left-handers remained in the minority, otherwise right-handers would soon get accustomed to fighting with left-handed opponents.

But what the theory doesn;t address is the difference between fine and gross motor skills. Lots of righties bat from the left-side of the plate, for example.

Hat Tip: Peaktalk