Hi, ARoarer
Your experience is good to inject into this discussion. Assuming you refer to law enforcement officials, the only thing I would add is that your opinion that "disclosure is painful but is always in the best interest of the child" is not accepted as a universal recommendation by quite a few caring and considerate professionals and other persons, including victims themselves. This is one reason laws vary on mandatory reporting. In the case of clerics, another reason these laws vary is because some caring people feel as though victims should have at least one authority figure they can go to without fear of automatic reporting, if that is an issue for them.
We all know child abuse is a horrendous crime, and that victims need every help possible, and this is the goal of everyone in this discussion. But the details of exactly the best remedy for each case, and whether uniform mandatory reporting should be required for any and all authority figures, is still being debated by caring professionals. Whereas you feel that disclosure to law enforcement authorities is always in the best interest of the child, others feel that most of the time disclosure is in the best interest of the child. The latter don't want to close the door on other options at the discretion of victims. That is the debate. The good side of discussions like we have here is precisely because the act of continuing dialogue is part of the process of improvement.
Regardless, the debate of mandatory disclosure by clerics should not hinder anyone from a uniform policy of always encouraging that victims (or their guardians) report allegations of child abuse to law enforcement authorities. A policy lacking this essential element is suspicious, at least!