In an age of Martial Art, Martial Artists were undoubtedly given a lot of attention and importance. In the eyes of sovereign states, Martial Artists were walking strategic weapons. They were no different from living tanks, jets, bombs, and missiles that had their own interests and agendas.
Martial Squires, among them, held a somewhat unique place. They were strong enough to be important and of great strategic importance, while also just enough that their numbers made them formidable, but not too many that they could not be individually treated as valued assets.
And only irresponsible fools treated valued assets without care and caution. It was impossible for a Martial Squire to up and leave the nation without some repercussions or measures being employed by states. Rui was smart enough to know that Kane's hopes of leaving the country, cutting all ties, and living a peaceful and blissful life were far-fetched, and the price to be paid for success was high.