Well... that's what NASA tells you.
Supposedly done 6x using 60's technology, so why haven't we gone back? They lost the technology and telemetry data???
NASA rocket scientists provided information backed by basic physics.
You can believe whatever you like, but that's doesn't alter the basic scientific facts.
Obviously one the main motivations was to show the old USSR and entire world , that the USA was the most advanced nation on earth.
Having various spy satellites in orbit along with "stations" to launch weapons is a better strategic use of "space" .
The use of advanced , high energy plasma based lasers in orbit on "attack satellites is a much more effective item.
In the 1960's at the dawn of the space race, project horizon examined having lunar base.
It was scraped due to the huge cost and growing dependence on earth orbit systems for spying and defense .
The moon has valuable minerals and ores but the cost to transport then 239,000 miles each way is prohibitive.
FYI, the modern nuclear " boomer" sub equipped with ballistic missiles is a much more effective weapons platform for national security.
It's the ultimate form of stealth warfare. However, the reality is, other nations besides the USA have similar capabilities.
I'm no world class authority, but I've read and watched countless conspiracy theories on everything from UFO's to covert operations.
A lot of it is mundane and a juicy "cover story" to keep people from looking at the national defense /military projects and operations.
Trust me , our GOV has done some questionable stuff in the name of "national security".