The weapons I forge are absolutely flawless.

"Why do you think the first sword the hero used was called the Mura Yoshitsuki?"
"As its name suggests, it is the best iron sword in the village."
"What if the village gets a better iron sword?"
"Then add 1 after the name."
"But the serial number is already +9527, are you really not just trying to ride the coattails of the Hero series?"
"Innovation and striving for excellence are my duties as a craftsman."
......
"Vina, we have received reports that you are manufacturing counterfeit and substandard products in large quantities. A large number of users have experienced equipment damage during combat."
"Nonsense! There is absolutely nothing wrong with the weapons I forged!"
"Then how do you explain this fact?"
"That's easy to say. They used my spear to pierce my shield, and the shield was pierced. Does that mean my spear was of better quality or my shield was of worse quality?"