Indeed. This is the key issue. If sin is a failure to deliver due to being human beings, then Adam and Eve were sinners before the fall, as was Jesus after the incarnation! Don't want to go there, do we?
But, if sin is a willful act, then there is hope for all of us in Christ. The Holy Spirit can cleanse us from all of the junk in the old man—after all, Romans (and other places) says we are DEAD! And a dead person doesn't have life in itself. All a corpse can do is stink...