Because they need you.
Your example reveals what loving God looks like. No degrees are required for this, and no special gifting is necessary. It’s simply God using your influence.
D. L. Moody had this figured out:
Moody’s boundless confidence in the younger generation, his outpouring of energy and time on those under twenty-five years old, was purposeful, brilliant, and extremely effective. His commitment to calling and equipping the younger generation should be an example and impetus to us. (from A Passion for Souls: The Life of D. L. Moody, page 26).
Whether you’re a colleague, neighbor, parent, or go to the same church, God will use your influence.