I did indeed mean "fake."
Look, the filming of a movie, even an incredibly complex one, only takes a few hundred people. Count the credits the next time you see a blockbuster. So with my eliminations from the people who worked for Apollo, we have not added the same number of people.
I believe all the engineers would have known. Obviously, the astronauts would have known. A lot of people who made the fiddly bits. At least half the people involved, hands down, vastly more than it would take to fake Apollo, even if I believed Apollo were possible to fake. Which it wasn't then and isn't now.
But when we're citing the number of people who worked on Apollo, not all those people were engineers. As I understand it, we're including everyone. The guys who built the buildings. The people who manufactured the screws and bolts and rivets. The people who made the mission patches. The janitors. The people who provided the food. The people who worked in the plants where they made Mylar and so forth. A lot of people whose jobs required no real technical knowledge beyond any required to do a job they might be doing for a strip mall or an auto parts manufacturer next. Now, they knew they did their jobs. They knew they did their jobs well. And, since I believe Apollo was a (qualified) success (after all, there's 13!), they did their jobs right. But would someone on the screw assemblyline know that the screw was being installed into x craft for y reason to produce z result on the Moon? It seems unlikely to me. Could the file clerk necessarily read the blueprints and what have you being filed? Maybe. Maybe that's a person who would know if something were wrong. But what about the guy at the print shop producing the manual?
The number of people who worked on Apollo is vast. However, I do not believe that every last one of them had the knowledge to be certain that what they did was the way it was for a vital engineering reason. If you're told that producing rolls of Kapton is important for the Moon landing, that doesn't mean you know enough to understand anything more than maybe the properties of Kapton.
Actually, I'm reminded of an old joke. A pilgrim comes across the site of a cathedral being built. He stands in awe, then goes over to a woodcarver. "What are you doing?" he asks.
"I am building a scaffold, which will help support the stones until the mortar sets."
He asks the same question of a quarryman, who says, "I am carving the great stones that will form the walls. They must be very precise in order to fit together properly."
Then, he asks the question of a little old lady sweeping out the construction site. She says, "I am building a cathedral to the glory of God."