You don't understand fam, we needed 30 freaking chapters dedicated to these scabbard twats walking around the streets with lOden!
People dropped to their KNEES for them! Oda wants us to do it too!
And we needed 15 chapters for these guys because they were super freaking important!
And the Straw Hat Grand Fleet has been absolutely essential to the plot since Dressrosa every step of the way! Remember how.... how that gnome and that Happo Navy guy saved Shirahoshi that one time?
Oda really won't stop with these filler characters. We're better off hoping that he gets some sense and hires more assistants to do most of the heavy-lifting for him while he takes a less stressful supervisory role, but he's too proud of having One Piece be "his personal masterpiece" to allow anyone else to touch the manga's art but him now, with the exception of some backgrounds.