In this case it kind of fits the point/arc of the story. The victims in the story have no idea why they do this, how they assess people, how to fight it... some

In this case it kind of fits the point/arc of the story. The victims in the story have no idea why they do this, how they assess people, how to fight it... somebody just showed up unannounced one day with a court order and viola, mom and dad's legal autonomy is somehow gone and their assets are freely mismanaged & stolen. Police & judges do not even pretend to care. As for why the "guardians" do it, it's right there for you in the subtitle.