>>936862548the moon landings were a propaganda exercise.
do you see any soviets around the place, launching spaceships to the moon or mars, to demonstrate the superiority of the Communist Man?
no, me neither.
And therefore, when the US won the goal of being the first on the moon, there was no more incentive to go back.
And when the Soviet missile technology was eclipsed by the mid-70's, there was no incentive for a massive rocket programme for anything outside of low earth orbit.
Its not complex.