Since sin is defined as any act that violates God's Will
No, actually "sin" literally means "missing the target". It means becoming unfit to the purpose. I posite that the original sin, the sin that causes permanent death, is the absence of a spiritual bonding with God.
You quote Romans 5:12? That was a predicatable choice. Again, where can you honestly read in there that God caused Adam and Eve to die? You can only do so by resorting to a lot of extrapolation to lead to a conclusion based on theology that is incrusted within yourself.
The only thing we can tell for sure by the accounts of the miracles of Jesus is that forgiving sins leads to healing. Period. There is no epistemological need for sin to be the cause of death and ilness. That was the old Jewish superstition - see John 9:2, 3 and the rebuttal of Jesus.
Eden