The point isn't the specifics; the point is that this isn't a postmortem.

A postmortem should be detailed enough for someone to understand the background, how the problem came to be, then what happened, and the walk-through what has been done such that it won't happen again. It takes … well at least a page. This is far too short to quality.

This is more "ugh, here's a rough explanation, please go away now" territory.

OpenAI isn't the first company to abuse the term this way, though. But it devalues the real PMs out there.