That someone would be all of the aerospace companies and their hundreds of thousands of workers who built the rockets, spacecraft, rovers, spacesuits, launch pads, etc. as well as those who supplied them with the raw materials they needed. It's been said that for every penny invested, something like 7 cents came back in spin-offs, including jumpstarts on integrated circuit technology (and ultimately therefore, the computers we are so familiar with), component miniaturization, materials science, medical science, and a long list of other items. These things would most likely have been developed anyway, but their use in the Apollo program sped up their development a great deal.

Diversion of Attention
Argument example: In the movie "Wag the Dog" the president has indecent relations with a 12 year old. This information goes out to the media one week before elections. To get the public's mind off of the little girl, the president stages a war with Albania. The Moon landings were the same concept. People did not like what was going on in Vietnam, so to get the public's mind off of all the bad things going on in Vietnam, the US faked the Moon landings. If you check your dates, we abruptly stopped going to the Moon around the same time the war in Vietnam ended.

Check the dates and facts again. Plans to end the Apollo Moon landings were already in the works by the time of the first landing in 1969 -- years before the end of the war in Vietnam was even in sight. The first lunar exploration ended far from abruptly. It was planned well in advance. There were originally 10 landings planned, Apollo 11 through 20, but first Apollo 19 and 20 were cut, then Apollo 18, making Apollo 17 the last lunar landing of the 20th Century. The Apollo program was initiated before the US was substantially involved in Vietnam, and more than 4 years before it could be considered a war. Apollo grew out of a cold war conflict over the minds and opinions of the US' technological prowess in the world and its eventual success was due to the hard work and sacrifice of the literally hundreds of thousands of people who built the Saturn V rocket and the Apollo spacecraft over the span of more than a decade. Tell them that their work was some elaborate hoax.

To Win the Space Race
Argument example: Back in the late sixties and early seventies, the USSR and the US were in a heated battle to see who was better. Once the US realized that they couldn't send a man to the Moon, they couldn't just say, "OK Russia, we give up."

And the Russians were going to roll over and go along with the hoax? It would have been fairly easy to discredit the Apollo missions in real-time if they were truly being faked so that an embarrassed Soviet government would be able to expose it rather than decide to cover up their own failed attempts to get to the Moon. They claimed at the time to not have been trying to land men on the Moon, but we now know that they in fact had a very aggressive manned lunar program, which will be discussed later on.