Armstrong's exact argument about the vast numbers conspirators that would be required to keep perfect secrecy is exactly what I use when people try to claim that the coronavirus is some kind of hoax or that there's some kind of conspiracy about vaccines. Have you ever tried to get thousands of people to cooperate on anything, let alone perpetuate a massive lie, when they have nothing to gain personally from doing so?
Yeah, people have been selling an invisible product since thousands of years (religion), so it is quite possible to get billions of people to lie to themselves and to others.
You can't apply "religion" argument that easily.