@geonz @eloisa @joannaholman All that, and to recap the original point - learning ANYTHING new is an exercise in learning how to learn.
Music involves novel materials, vocabulary, technique, etc, and (especially in school) usually means working with other people to achieve a result none can achieve on their own.

Unless you spend your life doing the exact same thing from age 10 to death, learning how to navigate all those kinds of things is useful.

But it requires work, which people dislike.