1. and he doesn't use it most of the time . even against WB who was called WSM in MF by his superior Sengoku , and Marco
in fact it was only against Rayleigh that he decided to use Ama No Murakumo . any other time he didn't
but Kizaru , Roger , and Rocks are ambiguous
Against Whitebeard:
-> He came, easily avoided Whitebeard's attack, pointed a single finger at Whitebeard and smiling shot him
Whitebeard couldn't do shit to Kizaru, why would he use the lightsword here?
Against Marco:
-> Marco and him were meters apart, he shoots lasers at him and Whitebeard, Marco rushes Kizaru who then tries to block the kick with his forearm, all while not even being fully serious as noted by Marco.
Where did Kizaru get the chance to pull out the sword here? Right non-existent. Or are you saying he should've tried pulling out the sword rather than use his forearms to block that kick?
Against Rayleigh:
-> He first got his attack deflected by Rayleigh's kick
-> He then tried getting past Rayleigh by using a light beam, Rayleigh cut it off and left him a mark.
-> Rayleigh doesn't let Kizaru go anywhere, and
forces Kizaru to fight him in CQC
-> Sentomaru then comments on the fact his uncle is held by the Dark King, homie is the real deal. Sentomaru knows how Kizaru fights.
-> We then find out that Kizaru was angry about the fact he couldn't get past the Dark King.. This indicates Kizaru was actually trying to get past him to get the strawhats, since it was a celestial dragon related issue.
Rayleigh FORCED Kizaru to use the sword. Whitebeard didn't force him to do anything. Marco forced him to simply raise his forearm.