People never admit that they are wrong. You can give them proof and lay it on a silver platter but people will still never admit to being duped. Instead human nature will have those people take days or weeks to accept the new truth. They will then begin to parrot it to their colleagues, friends and family as though they knew it all along. It's damaging to the psyche to learn that you have been believing a lie.
It takes TIME to redpill the masses.