Frankly speaking, this high school is designed to cultivate political and military talents for the heir to the Spanish throne.
Studying together from the high school stage allows the heir and the nobility to develop deeper bonds, enhancing their loyalty.
For the nobility, they certainly won't miss the opportunity to have their children study alongside the future King.
The nobility and the King prosper and suffer together. Only with the full trust of the King can the nobility fully utilize their abilities.
This is also seen as an early establishment of a support base for his son, Prince Juan Fernando. Based on the young fellow's age, by the time his classmates have acquired certain abilities and risen to the upper echelons of the state, it would coincide with the time Carlo abdicates and passes the reins to a younger successor to steer the country.
