It’s probably because a bulk of his replies have been along the lines of “the update transfer was probably corrupted, you must have misapplied it. Can you try again?”
At least one person in this thread alone mentioned reapplying the firmware update fixed it for them. "Try it again" is a common troubleshooting step for a good reason. There's no reason to assume malice from the presence of such a suggestion.
If trying again (and downloading a new payload) after the issue is revealed magically solves the problem without the company admitting they pushed a fix, I’m a little bit dubious.
Maybe it was actually what they claimed about it being a corrupted update then? And considering the issue is still an active fire they're putting out, I'm l is give them the benefit of the doubt. They seem to be genuinely scrambling, so their comms are going to suffer. If, in a couple days, things haven't changed, then there's reason to question the intentionality of missing followup communication.
Also, if they pushed a fix that worked reliably, they'd be shouting that loud and clear as THE solution, not merely suggesting to try updating and to see if it might help.