Okay, here is what I believe:

I believe landing on the moon and a live video broadcast from the moon are two extremely different things.

I think they did have actors on a soundstage pantomime to the live audio being piped from the moon. Just cuts down on so many variables, and the stakes were too high for the broadcast to be a technical disaster.

I think that even despite that, the moon landing is still one of the greatest achievements of humanity.