It will never be explained because it is both fake and necessary. The government can’t stop its employees from believing in pseudoscience and the supernatural thus making them targets of foreign spies.
Overall, some people involved in this do seem to want it to end. Even if you’re an influential actor within the Intelligence Community, you are up against say 20 other agencies/departments that benefit from the UFO enigma.
Check out this article from 2012 about “Spherical Aircraft” from Aerospherical Systems. Whatever the real UAP are, they are definitely not intergalactic. It would be impossible to keep it a secret.
https://www.unmannedsystemstechnology.com/2012/05/aerospheri...