I struggle to even come up with narratives as to why this specific case would be made public. Perhaps the intelligence agencies knew it wouldn’t be possible to cover up so the best they can do is release the evidence that was expected to make its way to the public and say nothing about it officially. If I put on a tinfoil hat I could say that the AATIP’s purpose was to instill doubt that aliens exist, but that would imply that they do exist. It seems that the intelligence agencies are behaving like they want to give as little information as possible about it. I can’t imagine the AATIP was made top-down. It appears to just be a congressman’s publicity stunt.