You could say the same of PE, maths, literature, or almost anything learned in school. Few adults need them in their lives, but they provide good habits and virtue to students. People who don't read and write anything outside social media are a loss to themselves and to society.

Disabilities don't disappear after school, and children who struggle with motor control in school will continue struggling with it on adulthood. Half the point of school is finding out your weaknesses and learning to overcome them in a safe and controlled environment.