I can't think why. Almost all conspiracy theory is compounded of excess credulity, overactive pattern-matching, and reheated leftover California counter-culture convictions regarding the so-called "Establishment".
The first part might be true for the Aliens/Elvis Alive/Illuminati kind of conspiracy theories.
But conspiracies happen all the time, and expecting them is not a "theory", it's a fact of politics and government, since before there was Machiavelli.
Everytime a government decision is taken behind closed doors for things that affect politics/the public/etc, it's a conspiracy.
It can be as simple as a few party heads deciding on who to push for the presidency (outside official party prodecures). Or a company paying a politician to pass some favorable law.
Or some public prosecutor trying to get some black kid thrown in jail, because he is convinced it's guilty, and not hesitating to supress witness and withold evidence (as has happened thousands of times).
Or it can be the head of FBI secretly keeping tabs on politicians and blackmailing them or giving tidbits to the press for those he didn't like. Like this Hoover guy.
It can be the President of the United States ordering people to break in the headquarters of the opposition party or eavesdrop on them. You know, like this Nixon guy.
It's idiotic to think conspiracies do not exist, or that "counter-culture convictions regarding the so-called "Establishment" were somehow proven wrong.
If anything, the whole Snowden affair proves otherwise. As if we needed such a thing.
People living in countries with actual heated political history, even places like Spain or Italy, know all about state conspiracies, including murder of dissidents (tons of them taken to court and proved from later, freeer, governments). Case in point:
It's only apolitical people living work-to-home and back everyday lives, and only getting their information from mainstream news that can claim that conspiracies don't exist. Open a history book -- preferably one that's not about the Civil War but modern history, and you'll find aplenty.
Oh, conspiracies, sure. You'd think that something called "conspiracy theory" would have more to do with them, wouldn't you? But the sort of person who, when presented with a big list of interests, would briefly consider checking the "conspiracy theory" box and then not just refrain from doing so in case the Men in Black might notice, but actually feel himself quite wise and clever for having entertained this train of thought, tends to be the sort of person who finds things which actually ever happen rather dull.
I'm still surprised, when I bother to think about it, that no eager beaver has come up with the idea that perhaps the US did land on the moon, but only thanks to alien technology reverse-engineered from the remains of 1947 Roswell crash.
I can't speak for your specific example, but there are some theories that equate the massive technology leap we had in the 50s->present day has been due to reverse engineered alien technology.
In fact Star Trek: Voyager did a two part episode that used this conspiracy theory as part of the main story line.
I suppose "aliens" are a much more attractive explanation than "government-funded wartime R&D centers plus post-war prosperity plus Cold War arms race equals massive scientific advancement"
