Why is it the case that social workers are always modeling as they practice?

Why is it the case that social workers are always modeling as they practice?
 
  a. Social workers are consistently doing the wrong thing in order to try and
  provoke their clients into considering what they say with critical analysis and
  questioning
  b. Social workers routinely demonstrate competencies in problem solving, facing
  difficult emotional situations, using directness with tact and sensitivity, clear
  communication, compassion, and other life skills
  c. Social workers tend to be photographed by paparazzi often and therefore are
  always trying to look their best in the latest fashions
  d. Social workers are actually never modeling as they practice