Don't think it says there are more psychopaths in those professions...just that members of those professions have more of a number of psychopathic attributes than disturbed criminals.
It lists 6 attributes but we don't know if that is 6 out of 7 or 6 out of 20.
Also, we don't know if having these particular attributes of a psychopath would be enough to cause you to act as a psychopath.
It also doesn't say how many of the 6 attributes each of the top 10 have...
So, for instance, each CEO might be persuasive, independent and focused....probably the traits it would take to become a successful CEO.
Even a bad sounding trait like Lack of Empathy... I wonder how long a Surgeon would last if they had strong empathy. Even if they lost only 1 out of 10 high risk patients, that would bear down of a person to feel the deep pain and loss when having to tell a loved one you failed and their family member died....