In case of emergency, whether the kid is lost or has gone non responsive to calls or texts, it can be important to parents who want to be able to know where to find them in those situations. Furthermore, there are some parents who are simply strict and want to track their every movement; which could be very intrusive, make the kid paranoid, and even ruin the parent-child relationship. That’s my take on it.
Maybe he doesn't want to have a purpose
God's attribute of being unchangeable is ETERNAL.
He Eternal is also one of God's names. Other names: The Holly Lord, the Master, the Lord