From ~1960 until ~1967, there was a remarkably poorly run program, culminating in the deaths of three astronauts on the launchpad. After that, the director of the program quit. You're suggesting that a massively dysfunctional huge organization created a complete fuckup for ~7 years, but then magically turned itself around, and over the next five years, put not one but several successful missions on to the lunar surface, including a fucking dune-buggy. After that, they then drop the whole program, with no missions since. Nah, I'll pass.