A Correct Diagnosis!
With No.1 running the Village, they must know, or at least No.1 must know, the reason behind No.6's resignation. So why continue to ask the question "Why did you resign?" Perhaps the doctor's diagnosis of No.6 in 'A B and C' is correct, that it is an anguish pattern - agonising physical or mental disorder. It could be that No.6 was still agonising over his decision of having resigned, and thereby he continues to persecute himself because of his resignation.
Be seeing you