The mind boggling effort of designing and making all the stuff to fake going to the Moon is so great (especially when no one at the time or later can be allowed to see through the fakery by determining something wouldn't really function properly), why not just go there?
Because that would mean having to accept the standard "gubmint" story. I don't think the hoaxers know or even care
what really happened, provided it's something
other than the official story. That's why we never get a complete alternate narrative. It also explains the strange subgroup of hoaxers who believe we went but that (at least some of) the photos were faked.
Creationists do much the same thing. In every case the goal is to simply to delegitimize some recognized authority (the government, the scientific and engineering professions, mainstream historians, etc) whose influence they resent and crave for themselves.