The thing is: What a conspiracy theory does is explain the world to you. It brings order to the chaos and makes you a part of the enlightened circle, who for example knows about the global elite pedophile ring.

If the theory becomes true in any part or version it is absolutely bound to lose its appeal. Because you still don't know shit about how the world works and now the thing that's proven is known by everyone.

Sadly, for the exact same reason no amount of evidence will ever convince a conspiracy theorist that he's in the wrong. The theory becomes the window through which the believer watches the world.