As other's have mentioned, the lies about WMD where rather quickly dispelled, and doesn't compare to moon landing conspiracy. As far as I understand the WMD fraud was successful insofar that the administration was able to use it as a pretext to go to war, but it was also quickly debunked.
I think you're missing the point that Armstrong tries to make. While he indeed starts with your selective quote, he then goes on to say that it is rather unlikely that the government would get away with a fraud of that scale. If nothing else, then simply because of the amount of people involved in the moon landing, and third parties that then and still to this day are able to confirm that the moon landing actually happened.
My experience is also that people who trust the tales of a conspiracy over a wide array of substantial counter arguments are simply not open to actual counterfacts from others. It's like fake news, the conspiracy supports their believe system, and rational arguments to the contrary simply isn't effective.
Still I agree that conspiracy nuts need to be confronted. Perhaps though, not so much in an attempt to convert the believer as to stop them from spreading the conspiracy to others.
I think you're missing the point that Armstrong tries to make. While he indeed starts with your selective quote, he then goes on to say that it is rather unlikely that the government would get away with a fraud of that scale. If nothing else, then simply because of the amount of people involved in the moon landing, and third parties that then and still to this day are able to confirm that the moon landing actually happened.
My experience is also that people who trust the tales of a conspiracy over a wide array of substantial counter arguments are simply not open to actual counterfacts from others. It's like fake news, the conspiracy supports their believe system, and rational arguments to the contrary simply isn't effective.
Still I agree that conspiracy nuts need to be confronted. Perhaps though, not so much in an attempt to convert the believer as to stop them from spreading the conspiracy to others.