I wouldn't disagree with you regarding that. [Jae-Ha is the oldest among them... although that doesn't always mean something. The age can differ from one to the next.]
But there is nothing we can do about that problem. [He saw how time ravished his father's body until his very last breath. He had hardly been an old man when he died.] All that we can do... is be grateful for the time that we have, and the fact that we among so many before us are truly able to exorcise our power to it's fullest extent. We have much to be grateful for. [When so many hundreds of others never had the opportunity that they do.]
I am grateful that I have the privilege to follow after the princess. And that I have met and get to keep the company of Ouryuu, Seiryuu, and Ryokuryuu. And due to that, I have met Yoon and even Hak. There is more to celebrate than to worry over.