if these things/craft do not exist and everyone has been making all of it up for the past 5000 or more years, why is all the information/truth classified?
In other words, they represent the military-industrial complex in Alabama and Ohio (Wright-Patterson AFB) and the MI complex wants to stop any language in the NDAA that requires disclosure.
The question very similar to yours is, "If there is nothing to disclose, why remove language that requires disclosure?"
It seems that Congress is being locked out of classified information that pertains to "non-existent" UFO/UAPs.