Castile and Aragon united in the 15th century into a single Spanish kingdom, while Portugal remained independent. Do you think it could have turned out differently?
The unification of Castile with Aragon and the preservation of an independent Portugal is a historical accident associated with the death of the princes and their heirs. The marriage of Fernando of Aragon with Isabella of Castile solved the problem of equality of two peoples in a single power.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.