CYA. You know what it means. The problem is that concept does nothing to make us healthier.
Drs. Y. Tsugawa, A.K. Jha, J.P. Newhouse, A.M. Zaslavsky, and A.B. Jena of Harvard (among other affiliations) published results of their study about these medical practices in JAMA Internal Medicine. (Actually, this is a pre-publication. )