Deckard said:
Well I remember reading People of Lie by Peck in which he posits that Evil really does exist and he presents several of his cases to illustrate this.
All these cases had in common absolute refusal of those who were essentially evil to expose themselves to the "light" of psychological investigation.
I was following exactly the same train of thoughts as you but in my reasoning those who are convinced they are superior and concieted beyond every measure imaginable in that superiority cannot even understand the concept of psychological work or introspection. Therfore I speculated these would simply fly over their head.
It seems to me that it is more of a case of psychopaths using such knowledge as a tool - therefore they are very interested in it, as a tool. As has been mentioned, they don't know what they're missing, just that they are different and superior (by their estimation) because they are not hampered by deep felt emotions or empathy. I suppose where we may be not connecting on this is that you seem to be equating knowledge of psychology and 'psychological progress and understanding' as undergoing therapy or getting treatment or even introspection - they are not the same thing. Learning about Ponerology is not psychological introspection so much as it is 'research to use as a tool'.