{ 1 } - Scientists deal with objective truth as such, and such a role is only secondary for health care professionals.
{ 2 } - Physicians generally make more money than scientists.
{ 3 } - Scientists are generally more honest than physicians.
{ 4 } - Scientists rarely deal with confidential matters.

See p. 104. The public has the right to evaluate whether or not physicians are providing them with a service, but they do not usually have the competence to tell whether or not scientific theories are true. Thus scientists must call each other to account, but the public can call physicians to account, and the latter are less autonomous.