It's an anti-feat for aCOC dickriders
It's "just" a strong AP enhancer to allow brawlers/swordsmen to compete with the strongest fruits offensively (like awakened Ope Ope no Mi or Gura Gura,), not an autowin.
If we believe Kuzan doesn't have COC then he managed to match Garp ACOC punch by covering his fist with a thin layer of ice, so not really surprising Ryokugyu can shrug off base Yamato hits even COC coated
It's "just" a strong AP enhancer to allow brawlers/swordsmen to compete with the strongest fruits offensively (like awakened Ope Ope no Mi or Gura Gura,), not an autowin.
If we believe Kuzan doesn't have COC then he managed to match Garp ACOC punch by covering his fist with a thin layer of ice, so not really surprising Ryokugyu can shrug off base Yamato hits even COC coated
Based on how much damage Jozu gave to Kuzan relative to what we’ve seen ACOC do to admirals