Alright, if you believe that being told something was bad can permanently forget you up but actually experiencing something bad is harmless, then it would be incredibly easy to prove. Go out and experience something tramatic. You guys, being so aware and intelligent as you are, shouldn't be effected because you know something is only harmful when someone else tells you it is. Armed with that knowledge, all you'd have to do is not believe them when they tell you you've been through something tramatic, and boom you'll have no adverse psychological effects. Seriously. Go to the seediest, most crime ridden place you can think of, get raped, beaten, and robbed, and then tell me if your little theory holds up. But I'm SURE that it will.
You know what, let's use my great uncle as an example. He was in the Vietnam war. When he got back he was declared insane. It couldn't have been the awful atrocities he witnessed in war that drove him insane, right? Nope. It was people saying to him: "Gee what you saw was awful I'm sure you are really beat up about that!" I understand that rape and going through a horrific war are not the same thing, but they are both psychologically damaging things.
tl:dr sympathy doesn't cause emotional development problems, tramatic events do. I'm really loving surprised I have to explain a concept so basic.