Interesting question that likely would have never crossed my mind on my own. I am not religious. But even in a generic sense of these terms, therapy involves neither confession nor absolution for me. In fact, I personally found the sometimes too lax apparent perception and feedback from the Ts potentially counterproductive (potentially harmful even if I let it influence my judgment much). I had a serious and potentially life-threatening substance abuse problem and telling me things like it was okay, most people have at least one addiction, recovery usually involves relapses etc were not helpful and constructive suggestions. I generally do much better with realistic, firm, even tough advice. In other areas of life I generally like my own standards and morals (when I am sober) and people in my everyday life often give me both constructive criticism and encouraging feedback, can relate to my challenges etc so I don’t fee deprived of and in need of these things. I would more seek consultation and pragmatic discussion/suggestions from a T to resolve my issues, otherwise I know I am vulnerable and my sins were not horrible things I cannot forgive myself (more regret doing). I imagine the things raised in the OP can be desired by people with chronic, unresolved guilt and shame feelings.