The priest is not irrelevant. A good confession is very good for the psyche and the soul, and a good priest can give you good direction to avoid sin in the future. Sinners don't have to be alone, and they can learn that in the big scheme of things, sins that overwhelm and baffle them aren't nearly as bad as they think they are. Priests have heard every sin in the book, and they have lots of experience because of this. They can assure you that things aren't nearly as bad as you think they are. After confession, I almost always feel good about myself.