It's a soundbite analogy suggesting that the Government isn't generally terribly organised and covering up something as huge as aliens not only existing but alr

It's a soundbite analogy suggesting that the Government isn't generally terribly organised and covering up something as huge as aliens not only existing but already having been among us isn't likely. Considering what he does for a living Seth must get asked this question loads and this is a convenient way to get his point across without having to have a long winded discussion every time on the complexities or unlikelihood of a cover up of this magnitude.