I don't think many people would buy your "more logical for them to just go on the record" claim -- in this situation, people are scared! And they have conflicted loyalties as well. They want to blow the whistle, but don't necessarily want to directly accuse their immediate colleagues to their faces.
Another viewpoint is that it's partly true but misleading -- the filmmakers and whistleblowers have blown things entirely out of proportion. That sounds entirely possible. But wouldn't the "logical" response then be more transparency, rather than accusations of treason and a witch-hunt for the collaborators?
And another viewpoint is that it's all completely fabricated, malicious lies. Possibly an extreme crackdown might be an appropriate response in that case? That seems very counter-productive to me, as an outsider, but again cold logic doesn't always apply.
Which of those viewpoints do you find yourself agreeing with?
To me, the broadly true one seems most likely from the available evidence; the hiding of evidence and the attempted crackdown support that one too. It also seems like some people genuinely believe (or pretend to themselves) that it's all malicious lies. To me that smacks of sheer paranoia. Understandable after the October 7 attack, sure, but not rational or productive.