All conspiracy theories are based on the premise that the government is extremely clever. But most of the time the government is actually extremely stupid.
If I were ever to win the lottery, first thing I'd do is hire someone to clean my kids room...and then buy some chicken wings with the $20 I have left over.
The people who doesn't believe we landed on the moon in 1969 are the same people who wears tin foil hats, thinking almost everything a is a conspiracy orchestrated by someone with nothing to do.