In software development it’s usually used to describe the situation after an incident was resolved. The team that’s responsible for the feature usually performs a postmortem to find out the root cause and find out what they can do to avoid another incident.
And I’ve also read somewhere that pediatricians who says it can also destroy you mentally when seeing parents who doesn’t really care about their children wellbeing.
I guess it tracks with not wanting to deal with shitty parents.