The problem is that the reason he is in a position to make his claims is because he is a sociopath. He has been able to selfishly lie to his own benefit to other people who believed it, and the burdon of telling the lie doesn't weigh him down because he doesn't understand things like compassion and responsibility to others. For this person to understand the difference as you say, they would have to see life without being a scholar. Clearly this isn't going to happen.