I'm not all that sure guitar-playing is actually lateralised ; actually, for expert shredding, when playing "right handed", it is the left hand that is really working hard. I think it has more to do with habits - and obviously, once you learn to play one side, switching becomes hard. Violin for example is clearly much more taxing on the left hand, and I never heard of "left handed violins" ...

Un roi sans divertissement est un homme plein de misères