In the English language we don’t say, “They made so many mistakes in the past that they know how to avoid them in the future.” Instead we say, “They’re experienced”. Making mistakes is what gives you experience. If you come out of college, and for your whole career never made one mistake, then only one of two things have happened: 1) You are bull[sh*t]ing yourself 2) You have never tried anything outside of your comfort zone. “Comfort zone” refers to things you already know how to do well. When you step outside your comfort zone, you will make mistakes, and the question then is how to recover.