I suspect that the oft-repeated instruction to elders to 'contact the Legal Department' is because the elders can then be directed to do (or not do things) that might not sit well with the principles of best practice in responding to (allegations of) child sexual abuse.
Sobering indeed that "worldly" organizations demonstrate far greater sensitivity and responsivity towards following Best Practice guidelines in response to allegations of sexual crimes against children than does JW.org. No way can the organization ever claim again that they are different (i.e., better) than the churches of Christendom.