Jianghu is not just about fighting and killing; it's also about human interactions... but there is a premise to it.
"When you can't directly eliminate your opponent, naturally, you can only talk things out with them."
This is the premise. The existence of a "communication platform" like the United Nations is necessary, especially in an era where the big shots each have the capability to destroy one another.
If everyone is a big shot, even if they don't resort to the ultimate measure, a real fight would be uncomfortable for all, so it's best to talk if possible. Fighting and killing are always the last resort.
Of course, if there's a clear gap between the sides where one can easily dominate, and there isn't any sort of punishment mechanism, there's no need to talk.
"....This time, it's the South One Church's fault, and they will make compensation."
When Lu Ping'an heard Lord Xiuyi, the mediator's resolution, he was somewhat surprised himself.