If you listen to any of the whistleblowers who have claimed to have worked on this tech (they believe it to be alien), they all talk about how compartmentalized it is. Nobody sees the whole picture. They are each tasked with working on one small segment.
The rebuttal to any claim of conspiracy is always, “How could they get thousands of people to go along with a lie?”
The answer to that is....”If you tell them that they are the good guys for lying, they will lie.”
The scientists have been told that they aren’t working on (and hiding) technology that could improve the lives of billions of people. Instead they are told they are working on “alien” technology and to disclose it would hurt people (freak them out, destroy their religion, etc...). This way the scientists developing the tech think they are the “good guys” for working on it and keeping it secret.
Then they are fakers, idiots or both.
Try to get a grip!