There are classified operations to test potential targets. And open intelligence networks to organize and connect disparate groups.
Different parts of the government benefit in various ways. It will never be explained because the government can’t stop its employees from believing in supernatural ideas.
If there is an illegal disinformation program or psyop, it is unconnected to the government and conducted over multi-decades. It will be extremely hard to prove until it becomes operational (ie in a hot war with China).
In the meantime, the og UFO promoters are aging and they have created a new religion to explain the mysteries of life and death. These are the same people behind Lue Elizondo and David Grusch.