If Apollo were faked, someone out of the thousands involved would have come forward and said something by now (my money would have been on an employee of one of the private companies, not a NASA employee).
Most of the Apollo workforce were contractors and subcontractors, not civil servants. But yes, out of a workforce that numbered about 400,000 at its peak,
many would have recognized a fake and blown the whistle. I've worked with Apollo engineers; if you had tried to get them to buy into a fraud, you would have have had your head handed to you.
Apollo hoax believers - who have absolutely no idea how how spaceflight works in particular or large engineering projects work in general - also like to say that only a select few would have known about a hoax. This, of course, is absolute ignorant fantasy. The program relied on both broad systems awareness, and deep specialization
with active collaboration among the different entities. HBs are simply incapable of doing such work and don't understand that it's not simply one guy blindly making widget A and the next guy uncomprehendingly attaching widget B to it.
Furthermore, the "hoax" would have required fooling not only the elite engineers and scientists during the program but also
those of generations yet to come. In fact, the hoax would have to
anticipate scientific discoveries of the future. Again, fantasy - and very badly thought out fantasy as well.
