Everyone in my large birth family are righties but my father prided himself on his ability to use a hammer effectively with either hand. He said that in a tight corner it was a great advantage. Several of my nephews are lefties. In other words, our family was completely in the norm.
During the last election campaign I was startled to see that both candidates were/are lefties.
I grew up thinking that left-handed people were somehow smarter than righties. Don't know where I got that idea but perhaps I had noticed that many (most?) of the creative kids I knew were lefties.