Any expert who's skill or discipline is pushing paper is not worth listening to. They are expert excrement expediters. With the help of semantics, statistics, verbal and emotional manipulation, and appeals to authority, paper experts can make fantasy sound real. They've had years of training and indoctrination in their respective paper pushing and theorizing.

The only experts worth listening to are those who's skills or disciplines are demonstrable through tangible and useful tasks. Physical therapists are experts. Clinicians are meat doing what it's told.