Yeah, well, I would like to know, first of all, why you are trying to remove player agency? Not just that, you're going against the whole tradition of D&D, up to and including the most awesomest things ever, like Drizz't, which is when D&D history began. Finally, are you possibly arguing that in a world of DRAGONS and FIREBALLS it is inconceivable that it is possible to practice nito with two katanas? I deny your expertise in anime, and call upon {30 page rant with, inter alia, Hatsu from Tower of God}.
In closing, {link to youtube video of person dual wielding}, {link to youtube video of General Grievous}.