Actually it is entirely logical that psychological traits will gravitate towards certain professions, those who like to kill would become a soldier, pedophiles will chose a job working with children, so it is not unreasonable or prejudice to stereo type in such a way.
In this case however, I not so sure the OP is correct about this profession, the following is a list of the top ten occupations to which psychopaths are found, followed by the least, I wonder if psychiatrists come under the "therapist" category?
So what jobs are most attractive to psychopaths? Here’s the list, originally published online by Eric Barker:
1. CEO
2. Lawyer
3. Media (Television/Radio)
4. Salesperson
5. Surgeon
6. Journalist
7. Police officer
8. Clergy person
9. Chef
10. Civil servant
And for those looking to potentially avoid working with the least number of psychopaths, here’s the list of occupations with the lowest rates of psychopathy:
1. Care aide
2. Nurse
3. Therapist
4. Craftsperson
5. Beautician/Stylist
6. Charity worker
7. Teacher
8. Creative artist
9. Doctor
10. Accountant