Yes language arts are the only constructive uses of our brains.

Nevermind neuroscience is arguing language has nothing to do with cognitive problem solving.

Cut open your head or a tree; where are the words?

Your mind is an electrical tensor that solves spatial problems without language. Literates have convinced themselves their grasp of the Kings and syntax of math is a super power. Nevermind physics has not seen fit to give them actual super powers.