Cost of Perfection

Whenever I find myself and my kid struggling with the perfection in her homework (that the world expects), I always have one question in mind:
It is important to teach her right; but how important it is to put unnecessary pressure on her to be absolutely perfect?
It is my experience that perfection comes with lots of pressure.
It is important to try striking a balance between the 'work to be done' and the 'pressure to be taken'.