Every field has practitioners who are more or less capable than others in that field.
In a discipline where life and death literally hang in the balance, it would seem mandatory that there be a failsafe mechanism to remove those practitioners who are less capable. Unfortunately, for the fields that are so-called professions, this is easier said than done. A profession is defined as an occupation that shares certain common features and provides an important service to society. Practitioners of any given profession often feel a calling to that service and that calling is often to serve society rather than to achieve personal gain. One criterion that defines all professions is extensive training.