As you say, it seems likely that the broad strokes of OpenAI's narrative is true. This is never in question in this article, so the author doesn't "stop short" of accusing them to have lied, he never moves in that direction and that has little to do with the thesis. The author is saying that OpenAI's framing of what happened is part and parcel with their longstanding PR strategy, to position models as supremely dangerous and themselves as the uniquely qualified stewards of those.
Since many critical details were not provided, everyone has to read in between the lines, and there are particular common readings I'm seeing both in discussions and in published articles that are problematic in the sense that they are effectively hallucinations -- i.e. we don't have enough information to make those interpretations. This is where the critical thinking comes in.
For instance, I see many are assuming that this event was emergent, arising as a part of routine cyber-capabilities testing, rather than induced or suggested by specific and careful prompting. Either are possible, but we don't even know so much as how lengthy the prompt they used was, let alone how suggestive it was with regard to the approaches the models used. Many are assuming that this was one-shotted, but again, we don't know how many times this particular evaluation was run and what the outcomes were of all the other runs. It could be that this was completely emergent and that it was one-shotted. But I suspect if it were, OpenAI would have said as much.