I can only speak for myself as I come from a very abusive childhood. I am an introvert by nature. So I am always looking for why I am who I am. And I do agree that life is much easier when one just accepts who they are instead of questioning it. Took me a lot of years to realize that. I have a degree in Psychology, which I can say is directly related to my trying to understand the past and the effects of it.
As I said I can only speak for myself...but I have asked myself many times if there was a connection between the past and my enjoyment in BDSM. The only connection for myself is that the past affects my limits. For me that means I have some limits that are harder to push and such. I want to enjoy myself not take myself back to that place. (hope ya understand what I mean). I can see the line between BDSM and abuse. My past helps me with that as well as my schooling and my understanding of BDSM. I did not learn submission from the abuse. I learn to hate. If anything the abuse taught me to be stronger in my mind. To respect myself more and to never be anyones doormat. I am not saying I haven't made mistakes along the way or that there haven't been times I fell into those old patterns. But the connection between the past abuse and BDSM is lost in the consent. You survived the past .You choose the future.
Thats just my opinion and well you know what they say.