My therapist thinks it is due to moral injury. If it had been relegated to the realm of "things that happened to me" I likely would have been resilient enough to endure them, as I had significant fortitude from a very young age due to lacking the sensations of emotion.
Even now it doesn't particularly bother me that I've been harmed by others. Every once in a while I regress and lose several stages of development where it is more likely to create child-like responses of "why me? Why are people cruel? Why blah blah blah?" But for the most part, it's the cognitive dissonance from being forced to hurt other people that created an impairment in my ability to use logical analysis (as opposed to subjective states).
It resulted in malfunctions like continuous thought loops, flashbacks, nightmares, conversive symptoms, etc. I get the feeling that this is probably a lot of people's "actual" reason - the more that they blame themselves, the less they can operate logically, the more destabilizing the experience.