It's worth noting that the quote in question is dubiously sourced and might not have actually been said by Einstein. So there's that.
But I am of the opinion that, if you don't have a full explanation of how everything was faked, it's simpler to assume that you just don't understand the thing that you do think was faked. As it happens, I'm another one of those people with some knowledge of film, and it's literally impossible to fake the Apollo footage in live action. I don't just mean the stuff on the Moon, either. You may be thinking of Apollo 13 and how well director Ron Howard managed to make the scenes in space by filming on the Vomit Comet. And that's certainly true. But you will also notice, I'm sure, that those takes are short, or else spliced, because it simply wasn't possible to do takes as long as the footage from the Apollo missions in orbit.
Further, the worst footage as far as accuracy is the fantasy about walking on the Moon. Because we to this day don't have the technology to fake all that properly without doing enormous amounts of it in CGI. We can't get the gravity and the vacuum right. We can't do it now; they couldn't do it in 1969. And since that footage is impossible to fake, it must therefore logically be real. And if the footage is real, you must be misunderstanding the thing that convinces you the missions were faked.