Accepting failure is a way of getting back on track. It helps to find ways to fix the failure.
If you are in the denying mode for your failure, what is supposed to be a small problem can turn into an enormous challenge. From which it would become harder to bounce back.
Also, you are leading others in the wrong direction by continually running the propaganda about showing your failure as success.
When you fail, accept it. That will start your journey towards finding the solution. And eventually will turn into a road to success.