

Multiple good hypotheses here. I’d like to add my own. The governments can be viewed as a modern iterations of religious cults, and there is no bigger taboo in a religious organization than questioning the basic dogma.
Try to question democracy in a democratic republic and you immediately get the weird looks, and irrational dismissal. 9 times out of 10 this self preservation instinct is good and beneficial to everyone involved, because giving a benefit of doubt to closeted authoritarians would be a mistake. That one time somebody really wants to have an honest discussion, it simply sucks.
Few things on this planet scare me as much as misfolded prions. Disgusting freaks of nature, turning organisms into living evil paperclip factories!