The study of the person of Christ is called Christology. One reason we should study the person of Christ is because the Christian faith is based upon and centered around Christ. Hence, the Christian faith is called Christianity.
Jesus is the One we must place our faith in to be saved. What we believe about Him determines how we relate to Him. If you believe He was no more than a morally upright human being, you will discount everything He said relating to His divinity. Only if you believe that He is who He claimed to be can you relate to Him properly.
Jesus may have looked like just another human being, but He wasn’t. He was the fullness of God clothed in the likeness of human flesh. Duration 15:22