You are completely right that this doesn't have a good outlook, but a self-fulfilling prophecy works in practice because of the societal friction. SK governmen

You are completely right that this doesn't have a good outlook, but a self-fulfilling prophecy works in practice because of the societal friction. SK government had probably one last chance to reverse its course, when it tried to move the administrative capital to Sejong in 2003, but it was met with hard backlashes including a very creative constitutional decision. Keep in mind that Sejong is not very far from Seoul anyway, and yet it failed; Sejong does host many administrative facilities, but is short from being the capital in any sense.