Assign Officers - why is it limited to selecting two roles per person?

The Toastmasters Club Constitution states:
"a club must have a minimum of three (3) officers: the Club President, a Vice President (either Education, Membership, or Public Relations), and the Club Secretary or Club Secretary-Treasurer, and each of these offices must be held by a different person."
AND
"In addition, the Club President and the Treasurer cannot be the same person."

With those rules in place, it is possible for one single person to be VPE, VPM, VPPR, Treasurer, Sergeant at Arms, Immediate Past President, AND Other Officer all at the same time in the same club. Why do we need an artificial restriction to only allow Assign Officers to give a single person a max of two roles?

While the example I give is ridiculous, I've absolutely seen smaller clubs where one person has 3 officer roles simultaneously. I'm sure there even exist some where someone has 4 officer roles simultaneously.