I never said anything about cosmology. I said we never landed on the moon. I have relatives that worked on the moon landing too so it wasn't fun waking up to that charade. But the evidence is there if you're willing to look at it. It's not a matter of intelligence - many extremely intelligent people still believe. It's a matter of...well George Orwell said it better than I can:

“Crimestop means the faculty of stopping short, as though by instinct, at the threshold of any dangerous thought. It includes the power of not grasping analogies, of failing to perceive logical errors, of misunderstanding the simplest arguments if they are inimical to Ingsoc, and of being bored or repelled by any train of thought which is capable of leading in a heretical direction. Crimestop, in short, means protective stupidity.”

Aulis.com is chock full of evidence to support the hypothesis that man never walked on the moon. If you're serious about dislodging the lies you've been told (about that specific subject) have a read.

But I can tell you haven't had to deal with the process or gone to the briefings I have if you think custodianship of secrets is "easy".

I never said there isn't a lot of administrivia associated with the protection of classified information. And I can't imagine how you have leaks if it's not employees discussing classified information with uncleared people.

"Keeping secrets is easy" to me means that I don't discuss work outside of work. Admittedly I'm not referring to secrets about hoaxes/lies although I suspect there are a lot of ways to silence those that are part of a big hoax (like the moon landing) to include NDAs with threat of prison for breaking them, secret society oaths (threat of death for breaking them), blackmail and threats of violence to family to name just a few. At the end of the day, most people are concerned with the three P's: paychecks, prestige and pension.

Hell even if someone on the inside came right out and told the truth, what platform would they have to spread the word? Media is owned lock, stock and barrel by six corporations who can shape the narrative any way they like. The average person spends zero time wondering how the world really works. They take what CNN tells them as gospel. If someone says, "we never landed on then moon" the average person experiences an immediate mind trap causing them to automatically think "oh look, another whacky conspiracy theorist". They're literally programmed by mass media to think that thought when someone goes out of the bounds of the mainstream narrative. You can thank the CIA for that. Look up the origin of the term conspiracy theorist.

Like I said, I don't expect to change your mind. You'd have to look at the evidence and draw your own conclusions. But not even looking...that's crimestop.