Some perspective on this from Dekker.
http://www.safetydifferently.com/is-human-error-the-handicap-of-human-factors-a-discussion-among-human-factors-specialists/

This is a work related personal injury and would certainly become an LTI .Seems the ACC form filled out by the treating doctor and patient may not have classified the accident as work related. Causation is not relevant as far as ACC is concerned.

Keep ypur head down, process your stuff, report what management wants and try to keep things simple for effectiveness. Appreciate your vision but suggest taking Tracy R's advice and read everything by Todd Conklin. You will need a very clear and persuasive case for the management team bureaucrats to let you loose on strategy and accountability.