The validity and reliability of opinions lie in their underlying methodology and evidence base. Reliance on the personal authority of any expert or group of experts is the fallacy of appeal to authority.

Physician Impairment The Sick Physician: Impairment by Psychiatric Disorders, Including Alcoholism and Drug Dependence…

Source: Disrupted Physician 101.4–The “Impaired Physician Movement” takeover of State Physician Health Programs

“Forget what you see Some things they just change invisibly”–Elliott Smith