Because they need you.
Your example reveals what walking with God and loving others looks like.
No degrees are required for this, and no special gifting is necessary. It’s all about 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. I pray that this book will encourage older Christian men and women to invest in children, youth, and young adults. (from A Passion for Souls: The Life of D. L. Moody, page 26).
Whether you’re a full-time youthworker, parent, or volunteer, God will use your influence.