I am not sure NASA ever lied about radiation. I am sure they lied about sending men to the moon. If I had been in their place I would have lied too. Billions of dollars wasted and national pride on the line. I would have lied my ass off. It was one thing to tell a lie and a whole different thing to believe a lie. I choose not to believe this one. The king has no clothes...
One of the many mistakes that hoax believers make is that they assume that the odds of performing an actual manned moon-landing would be likely to fail, but that
executing a hoax would somehow be automatically successful.
This makes no sense. Flying to the Moon is an engineering problem with known (or knowable) equipment requirements. You need large, multi-stage rockets, a guidance system that can navigate there & back, a vehicle that can land and take off, and life support systems to keep your crew alive. You can also send unmanned probes to measure the environment between here & there to help define your craft. All of these can be built & tested in a methodical, step-by-step process.
Everything is in the open. Nobody has to be looking over their shoulder or dealing with attacks of conscience. If they fail, the root causes can be found & fixed and they can try again. No honor is lost because everyone knows it is damn difficult. Even if the government decides it's not worth the cost to continue and pulls the plug, everyone knows it was a good try and at least we learned a lot in the effort.
On the other hand, one slip-up when perpetuating a hoax - one turncoat, one leaked document, one communications gaffe (you can't know who will be listening, or with what equipment), one special effect that's less than perfect - and you are the center of a national disgrace for all time. America's credibility is shot and very senior officials in the government will be convicted of felony fraud and go to prison for years. Don't forget that the secret
has to be kept for all time: No matter when it's found out, it will still be a world-wide public-relations storm that would make Iraqi WMDs look like an absent-minded goof. It doesn't matter how old you are, you can still be put on trial.
For those who think we faked-it to show-up the Soviets, do you really think that an administration that couldn't cover-up a 3rd-rate hotel burglary could keep this secret from the KGB? Do you think that America's mortal enemy would not use this as the ultimate proof before the entire world of capitalism's perfidy and corruption?
Don't forget that, as far as we knew, the Soviets were also going to land on the Moon, whether we made it or not. They didn't cancel their program until 1976. If we faked it and they did it for real, then who has the technological upper hand?
Any way you look at it, faking it would be more risky and less likely to succeed - with more dire cost to the nation in the event of failure - than actually digging-in, doing the work and going for real.