I know that about rape/incest survivors because I have met so many.
I was fortunate enough in life never to be raped by anyone, and for that I am forever grateful. I do, however, or did, suffer frmo manic depression, a condition which, until my doc found a reasonable med, landed me in hospital many times. (This is why I was fucked up, and how I ended up with low self-esteem to being with, wherewith many others were able to fuck me over afterwards).
When in such places, you meet a lot of other fucked up folks. I think being admitted to psych qualifies pretty well as "fucked up". Note that when I say "fucked up", I don't mean someone who has a couple of comittment issues, or is upset coz the guy she liked didn't bring her to the prom.
I'm talking suicide, serious drug abuse and alcohol abuse at a young age, cutting, burning, self-mutliation, depression, anxiety, panic attacks, eating disorders.... and EVERY SINGLE ONE OF THEM, bar the schizophrenics and manics pretty much, had been raped or abused in the past. It was just fucking INCREDIBLE how universal the experience seems to have been.
One woman whose psycho ex had stalked and raped her twice. Another raped at 16 and mutilated to the point where she can't have sex again, ever, by her kickboxing instructor. One raped at 17 and blamed for it by her mom. One woman who ahd had 5 of her dad's kids. One who had miscarried 3 of her dad's kids. 2 or 3 guys who had been raped in the showers at school. Many many young women who as 16 and 17 year olds had been taken out on a date by an older (usually early 20s) and raped when they said no, I'm a virgin, I don't wanna fuck on the first date.
Any number of women with abusive or violent husbands who raped them on and off over the years. Victims of pervert schoolteachers. It just went on and on and on and it was fucking MINDBOGGLING. I had known rape was contributory factor in many mental disorders, but had no idea there were so many who had been victims (guys as well as women - 99% of victims of gay male rape are not themselves gay).
I've had to deal with violent adults as a child but thankfully NONE of them interfered with me in that way....
I think you can see why I feel strongly on this, don't you....