I get what you are saying. What I have figured out during these videos is that Oda use so much of existing mythology and even real life events on your world. He must be one of the most well read people on the planet despite all the work he is doing to release One Piece chapters consistently.

There are things taken from cultures all over the world and so many features of the Japanese language are utilized to add extra layers to the story and even foreshadow a great many events. Try watching the Yuderon interview 😄
!PIZZA