I too have struggled with myself on being a perfectionist.
At one time it inhibited me, as fear of not making it perfect prevented me even starting a piece of work.
I see mistakes in every piece of art I have produced. I have learned to celebrate these mistakes as they are markers of how much I have grown as an artist over the years. looking at past pieces of work constantly reminds me of the mistakes I need to avoid in my current work as I strive for perfection.