Students need it.
They need it for trying learning strategies, which develop themselves as the student is learning: he applies those strategies that work, and discards the ones which do not work much.
He has to invent his way of learning and studying the language. Because of that, he needs creativity, which is a human essential characteristic.
Alike he needs creativity for making up original sentences in exercises and beautiful compositions.
He also needs creativity to gain the teacher, I mean, to carry out activities as the teacher likes. I tell my private-class student to make a nice handwriting if he has a FEMALE teacher. / Photo from: gymnaziummtm cz