Tbh I always thought that was always a garbage message to convey by Oda, but sadly One Piece revolves almost only around kings, nobles and royals etc.
Davy Jones? Probably the king of the previous world
Oden? Son of the Shogun
One of the 3 ancient weapon? A princess
The protagonist? Member of a special clan
the list can go on…
Even the straw hats mostly befriend with the royals, like Momo
Luffy is of the D. clan and grandson of Roger's rival.
Zoro is a descendant of Ryuuma, likely the strongest swordsman of all time, and countless generation of samurai of the Ringo region in Wano.
Sanji is the lost prince of a technologically advanced kingdom found on principles of supremacy, conquest and hegemony.
Usopp's dad is probably the best sniper in the world, or up there. Franky and Robin had parents at the top of their fields.
Only Nami, Jinbe and Chopper had humble origins. Brook was a military man of some significance at some point, but don't know much else.
Lots of nepo babies on the Strawhat crew. Especially if Yamato ends up joining and/or Vivi returns for the final stretch.