Topic aside, it is often strategically useful in these types of contexts to convey lower confidence than you actually have. Saying you have high confidence without the ability to provide the reason encourages other parties to wonder whence that confidence comes, which may induce them to search for an answer you don’t want them to search for. There are many audiences for these public statements and you have to thread the needle of desired effect without unintended side-effect. Ambiguity is an advantage.
There are also many cases where adversaries both know the true story, and know the other knows the true story, but neither side finds it in their strategic interest to publish the truth e.g. the optics are terrible for both for different reasons.
That said, this particular case of the CIA publishing a report seems performative for domestic politics rather than strategic, which also happens all the time. There was nothing new or novel. The internal view of the intelligence community has been pretty consistent for years.
There are also many cases where adversaries both know the true story, and know the other knows the true story, but neither side finds it in their strategic interest to publish the truth e.g. the optics are terrible for both for different reasons.
That said, this particular case of the CIA publishing a report seems performative for domestic politics rather than strategic, which also happens all the time. There was nothing new or novel. The internal view of the intelligence community has been pretty consistent for years.