You're right. The concept of natural justice is that if it's a circumstance in which the disclosure is about another individual, then that individual has to have the opportunity to also provide evidence and explain what went on. Sometimes all it takes is an explanation and clarification.
There are perhaps some concerns that the act isn't specific enough about protections for the alleged wrongdoer. The act wasn't really designed that way, for one person to make a statement about another person. It was seen as a more general approach to things.