And they can't do that if you are hiding things from them, whether they are true or not. They have to come to the truth the hard way. You are not a trustworthy source of truth if you don't trust them with ugly facts.

I believed what I was told as a child. I believed for decades that people were all the same. Then I lived in the real world, and people showed me what they were really like, and that the fantasies fed to me by mass media were comforting lies. They hid things from me, like crime statistics, and pictures of slums, and cities that had be ruined by incompetence and stubborn, denialist stupidity. They hid test statistics that had been consistent for over a century, things that Jensen and Lynne and Rushton were loudly declared racists for studying. But the real world reveals itself, and the truth is consistent with what they want hidden. If they told us the truth, we wouldn't have to go through this painful cycle, over and over again, where we learn that you can't make people smart by throwing trillions of dollars at education, and you can't make congenital criminals behave themselves by taking away punishment.