As for the rest of your post, V, even without reading these most recent replies of yours, I anticipated and tackled them in my above response to Lateralus and you [keep an eye out for the Old Yeller reference...]
Again, the human mind has defensive mechanisms that shield you from too much pain. This is why you can read about the death of a million in some battle and not grieve, while you might feel sorry over this girl.
And sympathy, empathy, as all human emotions appear in certain settings, in which one's mind responds to the stimulus in the other person. When that lacks ... I guess you appear like a fraud in denial. LOL!
You can understand it, and yet not be empathic to it. I don't see her example as any type of example but perhaps a medical curiosity. It does not say anything new to me as a human being. Not like other persons which did activate the empathic brain.