Rokushiki is based on physical strength is actually based on a

Chapter Discussion - Rokushiki is based on Haki, Page 6

One Piece 1068 brings back Lucci's Rokuogan

Rob Lucci Respect Thread

Chapter Discussion - Rokushiki is based on Haki, Page 5

Character Profile - Rob Lucci

While Sanji was in Nami's body he used sky walk, does that mean Nami has the potential to use Haki and the 6 martial arts? - Quora

One Piece Gold - Rob Lucci's vivre card said that: The training required for the acquisition of rokushiki is akin to that used for acquiring haki. Akin = in the family Rokushiki

Rokushiki & Seimei Kikan - One Piece: Lion's Path by TyrantTron335 full book limited free

Rokushiki is based on physical strength is actually based on a mistranslation in earlier One Piece volumes : r/OnePiece

How good is Luffy (One Piece) in hand-to-hand combat, for example, Taijutsu? - Quora

Chapter Discussion - Rokushiki is based on Haki, Page 7

Rokushiki, Wiki

Soru, One Piece Wiki

Honestly Oda probably should have just expanded on Rokushiki instead of creating Haki. He could have definitely made it to where there are techniques that allow you to hit logias and armament