I suppose a mirror can be useful, but when people stop singing their fantasies, the mirror exposes them to the truth, again. A reminder that no matter what someone may say, there is a reality, a truth, that cannot be changed. It is good for people to understand that some things are beyond their control, that they aren’t God.
As for indoctrination, I believe most of us here understand it well enough, though there is some indecision as to whether you didn’t sit for the entire lecture or simply don’t have the quotient to express it sufficiently.