Ask a surgeon.
Who said we learn? We just take a detour!
being wrong is still difficult, and not everyone learns from it anyhow
because some times we don't learn , we just repeat them over and over and over again, its only when we have had so much pain, we learn , and most people don't like pain. So its not the mistake its how the mistake makes us feel
Its becos most people find it difficult to accept their mistakes