Architectural schools, institutions, are 400 years old. Institutions are created because society has come together for the benefit of safety, economy, education etc. Some activities benefit society and the individual. Society reaches a concern threshold where it says, this aspect of life needs to be entrusted to an institution or a select few.
Institutions function to separate and reinforce general knowledge and implied knowledge.
Motivating factors include:
Self taught, self determination, skill building
Client driven, bi-lateral, spend time gaining expertise
There are institutional gatekeepers to keep the knowledge within the institution. They say who and what gets in and out and the quality of it.
Practices are established in order to keep knowledge stable, fixed and recognizable. The Question to ask is why there and not somewhere else?