I take it to be a hit on the tradition versus goals/original purpose that seems to be the main problem for the prince and all his relationships. There's no practical reason why the new capital has to be tied to his ascension to the throne or any specific time frame other than what is needed to do the job right. He's expected to do it that way because of tradition but, even though the tradition probably had the same goal as him of allowing an expansion of new industry and nobility, it's now an arbitrary rule that's getting in the way. Similarly to how the restriction on magic just hinders the younger prince's development and safety, or how the concubine rule is putting a strain on his relationship with the one girl he actually likes while he gets surrounded by girls he really shouldn't trust.
well, that's the theme I see with the prince. The 6 years is supposed to match him becoming an adult and next king but to point seems to just be that it's an arbitrary restriction setup a long time ago that keeps him from doing what he needs to or benefits those around him.
yeah, it seems relatively arbitrary.
but a society at this level of culture and development
needs tradition. the difficulty in proliferating information means "natural" social cohesion is very poor. if you don't have tradition, people don't relate to each other outside their usual circles, and that bodes very poorly when (not if) war happens.
sure, the prince can very well be a great king even without building a new capital; however, how many of his subjects would agree? it doesn't seem like military forces are centralized, which means the king relies on troops from the nobles that support him. if too many of those nobles don't approve, he's got a potential civil war in his hands.
anyways, i'm definitely reading too much into it, but that's how things worked IRL.
