I have what I think may be an understanding in the right direction: pain entered the world because of sin; sin does not originate with God, and thus pain is not His idea for us even though in omnipotent power He is able to work all things for our good. But that's just my "in a mirror but darkly," limited, understanding. The Almighty God doesn't need me to defend Him; He only asks for our love and obedience.
A popular Christian song has the line "When you can't trace His hand, trust His heart."* We don't need to understand in order to trust.
*Trust His Heart by Babbie Mason