I have never been abused. Not as an adult and not as a child either.
My daughter is 6, she has never been abused, not physically or verbally. I am convinced that one day, she will be a sub or a domme or maybe both. She ties stuff up all the time, tells me to choke her because it feels good and that she likes to cry.
I think that for the most part, you are what you are. I also think that if you are a submissive, and you live with or, in close proximity to, an abusive person that, they will likely be able to smell you out and take advantage of you. It doesn't mean that you are a sub because you were abused.