"There was not a specific occupation listed as Marriage and Family Therapist in the same study, however, there were multiple occupations in which a Marriage and Family Therapist may fall. McCoy and Aamodt listed the occupation “Therapists, all other” as having a divorce/separation rate of 24.20%, “Sociologists” as 23.53%, “Social workers” as 23.16%, “Counselors” as 22.49%, “Miscellaneous social scientists and workers” as 19.65%, and “Psychologists” as 19.30%. Each one of these categories had a divorce/separation rate well above the national average for all occupations of 16.96%.

The specific goal of that study was to further investigate the divorce rates of police officers as compared to other occupations. The researchers did not speculate as to why the divorce/separation rates of those in the field of psychotherapy might be so much higher."
Do Marriage & Family Therapists Have Better Marriages? – The Family Therapy Blog

Mr. and Mrs. Shrink: Therapists in Relationships with Other Therapists are Maddeningly Healthy | Observer