Should a shiatsu massage therapist take a complementary and alternative medicine course?

Why would s/he? Someone already trained in shiatsu massage is presumably competent to practice his/her own area of complementary and alternative medicine (cam). Unless s/he wants to also learn about other treatments and systems of healing that are part of cam, it seems unnecessary. An "overview" course in cam would probably be less in depth in any one area than needed to really practice that modality well.