MY OPINION ONLY!!
Ive read several theories on this. One that stuck with me (and helped me sleep better at night) is that certain people are wired as subs from birth. We are born like this. And thus, sadly, make easy targets as children and also adults. Thus explaining the possible higher rate of abuse. The traits that make us up- attention seeking, people pleasing, passive, etc, also make us easier prey from day 1. So.. we are not here necessarily because we were abused, we were chosen for abuse because of who (and how) we were.
We are not messed up, but unfortunately others in the world are.
Just my 2 cents. -WW