My guess is that at some point, they were taught to dismiss and refuse every single information that doesn't come from the "pre-approved" channels. No matter how clear, undeniable or outrageous the situation becomes because of their policies, they aren't supposed to change their minds.
This is one of the things that really got me worried a few years ago. Even after Lula was proved beyond any doubt that he was indeed a corrupt mastermind criminal, some people still stayed on their side. And when the Brazilians justice stained Brazil with the biggest shitshow this country had ever witnessed, even more got on their side.
It became clear that the massive brainwashing worked and that from now on, facts, numbers and the TRUTH no longer matter. What matters is what they're told by those they were taught to listen to, no matter what.
Get your mind and your heaty ready, do the same for your kids and loved ones, because things have gotten as bad as they could.