Organisations have a bad habit of using "human error" to blame systemic problems whose true root cause is inadequate leadership on individual low level employees. So, we're glad to see Facebook didn't try this shitty practice.
For a modern example, look for information on Symantec's "A tough day as leaders" in which they try to blame an incident that's clearly a result of at least incompetence by senior management on a single person who they've just fired. This is part of the sequence of events that leads to Symantec no longer being a trusted root CA. You won't find that actual post by Symantec because (of course) once they realised it wasn't doing what they wanted they deleted it, but you can find copies and references to it.
For much older examples, look at the early history of the railway in most of the world. Train crashes, blame the (often dead in the crash and thus unable to defend themselves) train driver, hint that they may have been drunk and were certainly incompetent. Owners carry on profiting from unsafe railway and needn't spend any money making it safer.