This chapter changed nothing.
Reread Nami vs Kalifa and Nami vs Miss Doublefinger, or Ussop and Chopper vs Mr 4 and Miss Merry Christmas, or Ussop vs Chew.
Ussop and Nami's opponents are always far stronger than them physically, and you would say, better fighters. That's why they don't fight them head on, where they'd get annihilated. They use tricks and strategies to avoid physical fighting as much as possible and that's how they win. Even then, there's stuff like Ussop's Alabasta fight where he had near enough every bone in his body smashed up and still won.
Nami is not going to be going head to head with Ulti or Maria. That has never been how she fights. She's going to be using her Clima Tact to create mirages, running away from physical attacks and setting up a position where she can hit her opponent with Zeus.
Chopper's in an odd case where he does both, he has Brain Point but he also has Monster Point.