Whether or not there is merit in the practice, a confessional is used by an individual to acknowledge and confess sin(s) they themselves have committed, to a single priest/minister, as a means to request absolution of the sin by God.
If the confessor and minister are known to each other, they may recognize each other's voice, but the practice is often performed anonymously and is to remain confidential between those two individuals only.
1) WT continually attempt to claim confidentiality of confession when a congregation member reports they are a victim of a crime. As a victim is not confessing a sin they themself committed (although elders often place blame on the victim), a report does not fit within the meaning or purpose of a religious 'confession'.
2) Once a JW Elder or Elders share details of a claimed 'confession' with the branch, legal dept, or other Elders that were not actually present when the 'confession' was given, then the sacred seal of confession is broken as it is no longer confidential between the confessor and their chosen religious representative(s).