But on issues like this there isn’t a debate.
Lets assume a scenario with BOTH 2)A and 2)B as you are proposing. (they are real and some parts of government want to release the info and some want to hide the info)
It would only take one entity who desired to hide it for it to be hidden. There is no prisoners dilemma or game theory to consider here.
If someone wants it hidden, they kill/imprison/silence the person attempting to leak it as they did to Assange/Snowden/Yeakey/Webb/Rich.
If you had followed this issue closely over a long period, you would be aware that the military has taken very drastic steps to silence people. It is only lately that some people have begun to buck the system.
This is one of those issues that cannot be analyzed from a distance. I think if you dig into it, you will find it to be much more complicated than it appears from a distance.
I'm not suggesting what conclusion you might reach. What I am saying is that I think you will find it a very interesting subject of investigation.