Conspiracy Theorists Are Simply CosPlaying to Avoid Crushing Reality
Conspiracy theories grow during times of institutional failure. If you can't have the life you were promised by your personal and flawed interpretation of the "Life, Liberty, and the Pursuit of Happiness" clause at least you can paint yourself as a hero struggling against a greater evil. You can be a knight or a superhero or a great revolutionary.
How do you want to be defined? By one action? By some opinion that could evolve? By a mistake, regrettable only with hindsight? Or by the sum of your parts? Okay, do that for other people. Start the trend.