Your arguments are that kizaru (an admiral based off a Japanese actor) is using an attack named after a Japanese treasure and that he fought other right hand men before
He has faced off against Roger's Right Hand, Whitebeard's Right Hand, was about to face off against Shanks' Right Hand and here you are arguing that he won't face off against Luffy's Right Hand.
The sword argument is even more evidence, when he used his own Light Sword to fight the Dark King. But sure, he won't use the same Light Sword against the King of Hell who is clearly meant to parallel the Dark King (MeiOu -> Dark King / EnOu -> King of Hell).
Fujitora and Greenbull didn't just appear together, they clearly have a lot of respect towards each other and like I said, they act like more mature versions of zoro and sanji
They appeared in one page together and that's it.
Fujitora and Ryokugyu are mature versions of Zoro and Sanji based on what lol? Sanji hates wasting food and Ryokugyu doesn't even eat food (taking it for granted). If anything Oda drew a clear anti thesis for Sanji with Ryokugyu but hasn't done anything like that with Fujitora/Zoro.