Handedness is considered genetic these days. Being a leftie or ambi can be considered a genetic fault also. Since we are the definite minority. We just ain't normal in the head.

And it's thought that lefties are far more likely to show at least tendencies to being ambi than righties also. Though no one is very sure just how much is due to just genetics vs needing to learn to live and survive in a predominately right hand world. And they claim even the most die hard ambi person has at least a slightly favored hand.

While I claim to be a leftie, I can, like you write with both hands and some other tasks equally from both sides. Though I still prefer the left. But I can't hit a baseball from the right side of the plate. Even though I prefer to throw right. I suspect that many ambi people are just lefties that are more willing to swing both ways.

****It been a long time since I went down this particular rabbit hole. I would not be surprised if I misremembered something or knowledge has advanced.