You're giving me more material to prove my point. It's like showing me a page of the bible to prove that god exists.
But sure. He says that the blades are crap. Why would that blade be crap and Enma be a meito? What's the difference? What's the point? So Zoro's Ashura would be as strong with those "crap" swords as it was with his current swords?
"A swordsman must master it and bend it to his will" - it's a symbiotic relationship. I'm not saying it's just the sword, and if Nami picks up Enma, she can suddenly one shot Kaku. But it goes both ways. I would give an edge to the skill of the swordsman as importance, like a 70:30, but you can't deny that it's a powerup.