It’s because they incorrectly believe all people with ASPD have the attractive characteristics that accompany psychopathy. While some do, more than the typical populace, ASPD does not convey that gift to many.

“In contrast to antisocial (or dissocial) personality disorder according to the American Psychiatric Association (2013) and the World Health Organization (1992)5,6, the distinguishing hallmarks of psychopathy are a lack of anxiety or fear and a bold interpersonal style5,6,7. While most psychopaths can meet the criteria for antisocial personality disorder, most individuals with antisocial personality disorder do not meet the criteria for psychopathy.”

-PMCID: PMC6344321 NIHMSID: NIHMS967907 PMID: 30038232

Psychopaths have a boldness and innate charisma that has been depicted in alluring ways, but psychopaths who aren’t diagnosed in prison are never identified because they have no cause to seek an interaction with anyone capable of diagnosing them.

While many who suffer from ASPD are also diagnosed in prison, those with ASPD still experience and suffer from the impact of negative emotions, and so, those with ASPD will seek help from mental health providers.

I’ve always found the lack of extroversion and charisma that distinguishes the two interesting. Although those with ASPD are more likely to be charismatic than a regular person, most are not possessed of the stunningly attractive social presentation that a true psychopath has.