Earlier quoted context omitted.
I agree with your description of what these correspondents consensus seemed to be at the time of writing. I don't see how this is at all consistent with that the paper claimed - "we do not believe that any type of laboratory-based scenario is plausible", nor how it was portrayed by the media - "COVID-19 coronavirus epidemic has a natural origin".
The phrase "is not likely" imo should have been substituted for "is not plausible", though I am not sure everyone else interprets the phrase "not plausible" as meaning something like "almost certainly not true"; they could have meant it as, something like, "the least likely of all the possibilities, by a fair margin." Sure, I'd have preferred if they had been explicit, by giving their estimate of the probability of e…
As an understatement, I don't think the authors accurately conveyed what their priors on the origin really were, nor what data they encountered to so dramatically shift these priors.