This is the best advice for anyone hoping to learn about…well…anything: get used to failure, because failure is part of the process.
At a previous job, one of my friends used to make a point of asking interviewees for new positions what was the worst disaster they’d ever caused, and what they did about it. It’s a brilliant question because it tends to paint a picture of the candidate in a real life high-pressure situation. Anyone working in a technical field who hasn’t caused some sort of disaster or other has either not been given the controls or is unaware of the impact of their actions. How would they actually cope with fixing a disaster – regardless of whether it was their fault or not?
Obviously there is the finite possibility that they are indeed perfect and infallible, but this is so unlikely that it’s not worth considering – and anyway, would you really want to work with someone like that?