Similar story for my wife, though it was an underfunded Catholic school with only right-handed sports equipment that pushed her to be ambidextrous. She's split pretty much 50:50 on which hand she does something with, though I've noticed she does actually seem to pick her left hand when its a totally new skill she hasn't done before.

My right hand is all but useless, I'm very left handed. Golf is the only exception, but I'm terrible in either direction and right handed clubs are easier to rent or buy.