Dictatorships are built on narratives. To stop them one must break their narrative, which is an iterative process—they’ll change the narrative to explain away new developments, but if you force them to keep making changes faster than their adherents can absorb them, their shared reality will fall apart.
Nothing can ever be perfect. We have AI detection capabilities to identify faked videos. You’ll never convince 100% of any group of anything. We still have to sway as many people as possible. Not every voter is a conspiracy nut.
Ding Ding Ding! This right here.
Unfortunately, they say one thing one day, and the opposite the other, and know their followers will latch onto the answer they want to believe/be true. It is exactly how religions work too.