The Fret family was not just the family who knew how to handle the resource metal, they could also produce weapons themselves. A lot of these weapons were superior to the weapons the upgraded Weapon Store produced.
For them, who had to go through many wars within a short period of time, this was an invaluable asset.
The Fret family held the technology of combining their metal to black iron, creating a superior Class D weapon. Even if his own weaponsmiths use them, all that happened was the black metal getting wasted or weakened. Those ores were not cheap, and seeing them wasted genuinely pained him.
Since they were in a war at least once or twice a year, it was extremely difficult for him to recover the losses. They had to strengthen their defences, and that meant weapons.
Every blacksmith in that family swore an oath with that family too, so there was no way for him to steal talent.
