Just Post

Assuming linear progress, Von Braun would have been correct. He failed to anticipate the limited attention span of the American public. By the 3rd or 4th moon landing, televised showings of it were already drawing less viewers than reruns. People just don't care that much.

Additionally, there's the increase of anti-science in the USA up to, and including, people who think space, the moon, or various other things are "fake".

The only bit of sci-fi we got was an ever-present surveillance state, now being augmented by AI. Not the future I would have wanted, but it's the one we got.