Religious "confession" only makes sense logically and realistically if the person confessing is exposing his/her SIN and vowing to never revisit it.
By exposing the sin publicly others can support the recovery (as well as avoid the blowback of a backslide).
The Catholic style "confession" is secret. Nobody knows. No one can lend support or avoid contamination.
It is anti-social and inverted (maybe even perverted).
Protecting a secret villain is conspiracy...even when the law is the co-conspirator.