Why do we say that the Principle of Subsidiarity, when observed, culminates to an active individual?

The principle of Subsidiaries emphasizes that authority needs to be matched with responsibility with close proximity to where action is to be carried out. This principle is strongly upheld by the Catholics, where they believe that the parents ought to take full control of the upbringing of their children.

This principle makes one an active individual because it allows the person/group to be directly involved in the decision taking process around them thereby interacting with people / groups around their place of locality.