Why has NASA never launched another mission to the moon?

NASA and other space agencies have launched missions to the moon, just not with astronauts. For example, the Japanese space agency once launched a satellite to completely map the surface of the moon in high definition detail.
The main reason (not sure why you don’t know this) we stopped sending men to the moon was that the Vietnam war was getting expensive and politicians decided to cut the space budget because we needed money.
Seems now like NASA is revising it’s scheme to return to the Moon within a few years time. Surely you’ve been following the news.