It’s a very interesting question, and I can’t speak to the science but I can speak to my personal experience.

Going back to childhood I always remember the adults insistence that I decide which is my handedness yet knowing intuitively that I could favor either side, and they each had an advantage.

I played left wing in hockey, only because there was never enough left-handed players, so I just pretended I was left-handed.

When I would play little league baseball, coaches would shout at me saying hey, don’t you bat the other way?! To me I just naturally, almost randomly picked a side according to how I felt about the pitcher.

When I played snooker semi-professionally, I shot right handed, but not because my right arm had more finesse, but because my left arm was better at providing rock solid stability with fine control, and because my right eye is slightly stronger. In my life, I played perhaps 50 games of billiards left-handed, out of perhaps 20,000 games total. And I can pick up and play left-handed with ease… You would think I’d been shooting that way my whole life.

I use my right hand to write, but when I skateboard, I skate “goofy foot”. When I destroyed my shoulder and it was a piece of meat hanging off my body for 6 months, I picked up a pen in my left hand and within 3 days I was writing at the same grace I could in grade 6! Within a month I was actually writing better than right-handed. It was still chicken scratch so I’m not sure what that’s worth lol

I know that I am right-handed by choice because there’s a difference in the knuckle/tendon of my left thumb. It makes it impossible to move from certain positions on the “circle” to others without first moving to a transitional spot. And I have more dexterity with my right for that reason alone.

I always wanted to play on P2 of the Street Fighter II cabinet.