It's as if someone said, "there is light in the world and I am able to see because light comes from my eyes." (People did indeed used to believe that eyes radiated light so that objects could be seen.) Such an eye-lighter will never process the experience from other people that the world did not go suddenly dark when the eye-lighter closed his eyes.
But back in 1969, it was way easier to just go to the damn moon than it would have been to fake the video sent back.
Even in Kubrik's 2001, there was no effort at all to film, say, even what walking looks like on the moon--even in the shots which putatively happen on the moon--even in the shots which happen indoors on the moon! It just would have been too expensive. This in a film in which they went all-out to create awesome special effects.
I think most people (including me) think the tech was too primitive. This is what I think computers were then [1]
Ultimately, I think bad ass people banded together and worked their butt off to pull off a stretch goal.
I wonder if I romanticize engineers from then or there are similar folks today.
- no stars in photos (film’s dynamic range too low)
- no observable landing sites (resolution of telescopes too low)
There are many others.