They could have spent all the money instead at Las Vegas, and had a very good time, and then spent some more money on drying-out clinics and therapy for gambling addiction and STD treatment!
And that would have done the Las Vegas economy marvels!
The question isn't did man step on the moon, it's why haven't we been back?
What would be the point?
The initial landing was a PR coup scored against the USSR in the days of the cold war. The US got there first. They learned a huge amount in the process, but the next logical step for this would be to set up a permanent moon base. Technology back then wasn't advanced enough for that. It's probably more or less there now - not looked into it - but that's no guarantee that it's going to happen while rushing the job.