imperfection

An essay cannot be too perfect because when it was too perfect, there wouldn't be any second chance given to amend the mistakes we have made.
Because it was too perfect, second draft would not be given.
Because it was too perfect, lecturers would not mark seriously because they thought no improvement is needed.
Because it was too perfect, the communication gap between students and lecturers would widen as lecturers have no comments on the essay.
Because it was too perfect, students would not able to work hard in the next time because they thought their essays were already perfect.