I don’t know if being ambidextrous has ever given me any cognitive advantage, but it sure as hell helps with sports like surfing, etc. along with using computer mouse control gestures in one hand while using keyboard shortcuts with another hand simultaneously, etc. - I’ve often been referred to as “creative” and I feel creative, but that certainly hasn’t translated into general intelligence.
I just enjoy using my left hand along with my right because it makes me evil.
