User blog comment:Ghmorello/Chapter 927: Wano's Next Top Geisha/@comment-29391896-20181207104928/@comment-2600:1702:3C50:A6E0:A92A:75D4:B5C1:6BC8-20181209005148

I would have liked to see that too, but not all of the characters have arcs which focus around them beating up some strong individual. Also for the first half of Whole Cake Arc fighting would not have helped his disposition. Defeat Judge and he needs to fight his way out of Totland and avoid Zeff being killed, defeat Niji and his brothers and still have the same problem. Tell Luffy about his situation and risk Luffy entering a fight he cannot win with the resolution to win or die trying. His hands were tied here and only at the second half was he able to do something. If he had rebelled at the beginning then Zeff would have died and he would be spending this arc crying his eyes out at how the man who raised him like a father raises his son is dead all because he had the bad fortune to take Sanji in. Now, Big Mom is not going after Zeff because it would be the same as Sengoku carrying out his threat to Garp to kill him for his families sins; neither scenario fixes the problem. Zeff is not the reason that Big Mom's plans have taken a little dive (off a cliff) and that her reputation as an invincible godlike woman has been slightly damaged (completely wrecked) so killing him will not help. If anything at this stage it will only make her look like she is trying to keep her reputation intact somehow. If she wants to get her reputation back she must kill Luffy and the Strawhats which involves leaving her territory vulnerable to outside threat.