Pre ts it was arguable, post ts it became clear who got the main focus
The group she was in was named after sanji, and she was the name to name it along with chopper lol
Honestly I feel bad for whoever still thinks Nami is the left hand where it's clear she isn't, sanji is, she literally couldn't even argue with zoro during the usopp situation, she's not a leader or a left hand man
She's a very human character, that's what makes her lovable, she took only 3 decisions that impacted the story, while zoro and sanji took dozens, the fact that isn't that impactful adds to her importance, she struggles to do things the monsters in the crew do easily, she is "weak" and it's a good thing in a way, I don't get why people try to push her to be what she is not