Comments of chapter undefined of Tales of Herding Gods

Saint Woodcutter gave a hard knock on his head and said angrily, “Where would my manners be? How could I lay my hands on juniors? If I did, other people could just come and kill you too. If the older generation kill my disciple and I kill their disciple, won’t the younger generations all be dead if we keep on killing like this? The rules can’t be broken.” In other novels, after MC kills one of his opponents, one of the older generation comes, and then another one... until he wipes out all of their clan. Which makes me curious on how are there even still experts if the older generation in those novels act like that....