You can do everything right in life and still fail. You can leave half an hour early to get to an appointment, then hit forty five minutes worth of traffic. You can eat right and exercise, but still get sick. You can pour yourself into a job application, and still get rejected. You can save up to buy a house, only to see it burn down.
When those things happen to us, it’s very easy to to see what went wrong (i.e., something out of our control). We’re at the center of it, after all. “Life ain’t fair” is one of the first lessons parents teach to their kids.