Weapons are tools for killing, while Combat Techniques are methods for killing. The eighteen combat techniques passed down to this day, aside from those meant for physical fitness as an initiation, are all designed for more efficient killing.
Most combat techniques took shape five hundred years after the founding of Huiyao, as that was the era of the most frequent wars. Countless heroes and martyrs risked their lives battling the Sea Barbarians, Mountain Barbarians, Wild Barbarians, and Grassland Barbarians, expanding Huiyao's territory to its current extent. In another hundred or two hundred years, it's possible there might be animal protection organizations advocating for the care of the near-extinct Barbarian Race.