I think it goes deeper than hand coordination... I mentioned a little experiment with a bolt and a mirror.. no don't break the mirror! Take a regular right hand thread bolt and view it in a mirror while comparing it to it's "natural" appearance. Look at the pitch of the threads! Our perception is not symmetric! We aren't all the same either.. even left-handed people aren't all equally left handed. I write with my left hand but I throw with my right and turn left best. Our field made right hand circuits safer so I learned them as a beginner... but the expert always came in left-handed.