School is a general teaching base, it is meant to teach scientists, engineers, farmers, social workers, builders, ect. The reason it does this is because in a crCIA, it is expected that people be able to fill these sorts of roles. After high school you can branch into any kind of specialty you want, but you will use something you learned. For example, a coder would use math he has learned to write a code that works while a photographer would use knowledge of historical art to influence his work.