Now as for whether Narcissistic Personality Disorder is curable – we say that in the right family environment sometimes it is. However dealing with a person who has considerable charm, but no real connection to their morality is NOT something you should take on lightly.ow as for whether Narcissistic Personality Disorder is curable – we say that in the right family environment sometimes it is. However dealing with a person who has considerable charm, but no real connection to their morality is NOT something you should take on lightly.