The acceptance is always understood as being vicariously earned through Christ’s atonement. The message is not “You are acceptable as you are and have always been.” The doctrine of original sin still predominates, and you will always be considered a sinner, albeit “washed in the blood.” The bargain is to admit your sinfulness and then be accepted. For many people eager to be free of self-loathing, this is a bargain indeed. They are willing to accept the whole package deal of religious dogma that the church requires in order to get the relief of such a reprieve.
This is a great example of how something as simple and kind as "you are loved unconditionally just as you are" is twisted into a way that keeps you indoctrinated