A possible theory is that the use of both sides of the brain helps in processing a large amount of information. The left hemisphere processes analytic and verbal style of thinking and the right one is associated with a holistic, creative style. Better memories have been observed in people who are right-handed but belong to a family that has many lefties. Additionally, lefties are said to have an advantage in interactive sports as most right-handed players practice against right-handed counterparts and when they face lefties, they are not ready. This is advantageous for left-handed players who can overcome right-handed and left-handed players easily.

Source: The Guardian October 20, 2019 03:00 UTC