This process seems an invaluable aid to learning, and yet many people avoid situations in which they might make mistakes. The lightbulb was an invention with 1,001 steps. I think it goes back to unworthiness. We assume a faade of perfection in a futile attempt to prove our worthiness. Alas, being human, we make mistakes.
Mistakes crack the faade.
The goal becomes excellence, not perfection. Aim for success, not perfection. Never give up your right to be wrong, because then you will lose the ability to learn new things and move forward with your life. Remember that fear always lurks behind perfectionism. Confronting your fears and allowing yourself the right to be human can, paradoxically, make you a far happier and more productive person.