Who expects children to be perfect?

With all the articles in Nursery World about appropriate practices in nurseries, why are some nurseries still dictating to staff how perfect their classrooms should look? For example, I was interviewed at one nursery who insisted that children's work should be displayed only if it looked perfect. A staff member told me in confidence that she would spend hours choosing art projects that looked neat. In some cases she would even do the project herself. As I looked around, I did not notice any eye-level pictures of the children's work, nor pictures that the children could look at while in...