@vc commodore , its not an issue of rotors being a consumable item according to Holden, it’s an issue of whether a product is faulty according to ACL. Pure and simple. Consumable items can still be faulty after all.
If, for example, a caliper piston is stuck in its bore due to manufacturing fault, and as a result the brake pad is forced against the rotor causing it to overheat and warp, then how could anyone rightly state it’s not a warranty issue because the brake pads and rotor are consumable items.
The fact a dealer’s first utterance is always that such items are not covered must be taken with a grain of salt. Some checks must be performed to verify that the caliper, piston, pad and rotor are operating correctly. Obviously if the pad is worn diagonally, something is wrong and the lining is not being consumed appropriately (evenly). As such this is one case where a consumable item ishoild be handled under warranty. Another example that comes to mind is the clutch (assembly?) in some performance fords were replaced under warranty. According to your mindset, this is a consumable part so the owner should wear the cost - fact is opposite to your view.
Excluding vehicle abuse, which is never covered by warranty or ACL, my experiance is that rotors simply shouldn’t warp within 15,000kms. As such, I’d suspect something odd is occurring. I’d be asking for calipers, pistons, pads and rotor to be checked. If nothing mechanical is found, I’d ask for the rotors runout checked and also for areas of the rotor hardness tested to check metallurgy.
You of course are free to simply accept whatever a dealer states as gospel and pay for repairs that could have been argued as a warranty issue.