I am a Christian. God saw fit to save me on Aug. 25, 1991. I know because I was there.
I am "born-again", "adopted", "regenerated", "justified", and "grafted". These and other terms are used to describe how a person is taken from spiritual death and made spiritually alive. The term "born again" has a lot of baggage in the minds of secular XJWs that they have brought over from their JW days.
Jesus said that one must be born again. The transformation from being a son/daughter of Adam to a son/daughter of God is a dramatic change, just like birth is a dramatic change. All the other terms I listed above have dramatic change in view also. I think God wanted us to understand just how dramatic this event is.