I am a social work educator and clinical social worker in private practice. I have nearly 4 decades of supervisory experience with students, post Master's employees and licensed therapists. I fully understand the need for social work to provide qualified supervisors to assure that the knowledge, skills and ethics of the profession are carefully taught and modeled. This is crucial for the protection of the public.
That said, a licensed professional who has had the requisite 14 hour training program should be fully qualified to provide supervision with an update every 5 years if there are significant regulatory or procedural changes. A professional's continuing education with its current requirements for ethics training are considered adequate for practice which also should include supervision.