Could very well be on to something, but many right handers golf and bat left. Not terribly uncommon.
I used to borrow my dad's hockey sticks all the time when I broke mine because we both shot right. First time I went golfing, I grabbed my dad's clubs, got to the course, went all the way out to the tee and realized he golfed left.
It was like finding out your dad was a double agent.