John says “and He Himself is the propitiation for our sins; and not for ours only, but also for those of the whole world.”
You quote this, yet after quoting it you dont seem to accept it.
Listen, you cant on one hand list the blood atonement as the final solution for sin once applied to a born again person, and then try to explain why you need to later confess sins as if the blood atonement is not in effect
There is no such thing as a sin that the Blood of Jesus has not already paid for....and this is why, there is no need to confess sins..... as they are already paid for, by the Cross.
So, this is why "confessing to be forgiven", after we are already forgiven..... is theology that omits the blood of Jesus and replaces it with "confession" as the means to be forgiven.
That does not work, regarding redemption.