There are kids age 7 that are brighter than grown ups age 47. And those kids can get bored when they are forced to practice the alphabet when they write short stories already, and such things.

Imagine someone forcing you to sit at a desk and practice spelling of basic English words?

And they can lose faith in school. And also it can be harder for them to find friends, when their thoughts and interests are a lot more grown up than their classmates.

It can be frustrating and lonely for them.