This comes up every time secret information is dropped and applies equally when it's more covertly released. The obvious reason is they get to choose what info

This comes up every time secret information is dropped and applies equally when it's more covertly released. The obvious reason is they get to choose what information, when, and how its disclosed. For example, hack both sides, release one at a damaging time and blackmail the other into compliance. Indiscriminate releasing of information can put people in immediate danger (like embedded spies). You can also drop misinformation into a dump of legitimate information. Or a similar technique where you exaggerate true information because admitting to the truth is embarrassing; like claiming 1,000 civilians were killed when the actual number is closer to 600.