I suppose that in a way, that's made my point too, Waddo Plumber.
My initial intention was to say that in your average AAIB or RAF accident report, the physical root cause is always sought, as in..
"The nozzle lever was inadvertently moved to ...."
Or...
"At which time the main fuel feed to the engine fractured.."
As opposed to the meandering ramble that took place in this instance. We know that a double hyd failure caused the aircraft to crash, and we can all see how that might have taken place, but the report goes nowhere near HOW it may have taken place as regards which component was likely to have failed, and how that failure led to the other sequences involved