But that would presume that the people on the spot were in possession of all the facts to answer any and all questions posed
No, it very precisely
doesn't. That's why you will see folk from NTSB and others on TV within hours of an accident, talking coolly, calmly, and with great authority, about what's happened.
That's what this type of training (which NTSB staff
et al get as a matter of course) is all about.
May I suggest: I know f-all about flying the Blenheim, so I won't post about it. If you know f-all about the media, move on to a post about something else.