Knowledge, lets say all of knowledge is a scale of 1-1,000,000.
I would say that I have some, lets say I am at a 4 out of 1,000,000. Of that 4/1,000,000 I would say 5% of my real knowledge can not be talked about due to NDA. I have NDAs with government and private groups. I have served on boards and committees in my life time to receive some real world helpful knowledge only to be told I can never talk about or else. In the end the knowledge was used to extremely help a few at the executive committee level.
Anyway, hiding the truth sucks. I understand let’s not disclose where a confidential informant is and there is time for secrecy and even lies.
Finally, public servants need to be public servants, not self-servants.