The youth of the Great Houses of the Realm can be so much trouble - the simplest thing to do is to send the annoying brats off to run some embassy or satrapy far, far away where they can't get into any trouble. Well, they can get into trouble, but at least they won't start a civil war or damage the fabric of reality. Or if they do, they're thousands of miles off, deep in the barbarian lands, and they won't interfere with your tea.