Comment by DrDroop

No, I think there is more to it then people what to admit. For example, there is a lot of comorbidity between ADHD and narcissism. There might be less social stigma about being the quirky inattentive ADHDer rather then the selfish narcissist but they are both attention disorders in some way. MRI scans of people diagnosed with NPD show that there brains prefer their dreams over reality. Meaning, there is a pathway in your brain for sensory information (exteroception) and a pathway for predictions your brain makes (interoception). For people with ADHD and NPD their interoception will often overwrite their exteroception when there is a conflicting signal.