Still no, that's headcanon, nowhere is it stated that you need to be one with the sword to tame it. what he needs, he doesn't have i.e. strong coa/ryou, iirc he hasn't even shown it yet on panel.
And the last time he had a sword fight he got his ass kick.
i never said you need to be one with the sword, what i Meant was that swordsmen have similar relationship with the blade like chefs do
i didn't know compatibility with the blade equated to your haki well it lowkey underestimating sanji's haki who's baout to whoop a YC..
the last time sanji had a sword fight was with wanze and we know what happened.
the rest other fight with swordsmen like
Daifuku.. Sanji was easily keeping up with
his giant blade than just chapters ago split a part of his fleet in half.. with sanji still holding back against him, Judge etc while retaining minimal damage