In science, you make your mistakes in public. You show them off so that everybody can learn from them. This way, you get the benefit of everybody else’s experience, and not just your own idiosyncratic path through the space of mistakes.
I work for “open” not because “open” solves a specific scientific problem, but because it increases the overall probability of success in sensorism-driven science. Even if the odds of success themselves don’t change, increasing the sample size of attempts will increase the net number of successes.