I'm not an expert, but I'm pretty sure when the US-AG shows up, POTUS letter in hand, and says I need access to your SCIF... people either step out of the way or they get arrested.

The key to this is that once Barr gathered the info and handed it to Durham its already declassified. Just because it hasn't been released to us in the public doesn't mean its still classified. They are holding onto that material like a time-bomb. That's why the cabal is so panicked. They know de-class has already happened. Trump already ordered de-class. Release is the next step. Q/Durham etc are holding back the release. One would assume the purpose is to ferret out everyone involved.

If they start releasing what they know the rats will all jump off the ship. Right now they hold some small hope they can prevent Pandora's box from being opened.