Mandatory reporting, I think, is intended to flag the potential that this is happening or may be likely to happen in the future.
It doesn't become a crime until it happens though.
Maybe I've answered my own question / outrage? As a rule, I don't support "pre-crime" ideology. What are the definitions of 'abuse'? What household situations point towards the likelihood of future 'abuse' and is this just 'pre-crime'...?