Batman:
the Comcom has already fined numerous businesses for selling you the CGA
I normally either negotiate a very very low price for a 4 year extension (which brings most things to 6 years) or I don't.
There are some benefits with a 6 year warranty - I have had a few things crap out at 5 years 10 months (no joke), and you call them and there is completely no call out fee, no transport fee (eg a fridge would need to be trucked to the repair shop), etc. Had that happen a few times and it's more than pay for the hundred bucks I paid. Once I was in Australia and harvey norman's warranty covers everywhere that has a Harvey norman! But that was my fault apparently, a sock found its way to the water exit of my bosch washing machine, but I do fill it 3 times more than its rated capacity. It's now over 10 years I've had that bosch ...
Apparently for the cheap stuff they give you a new one - I have not had that before so I don't know if they will or won't. I bought a 6 year warranty on a handheld vac just to test it out!
Time is money is the other thing. You could literally spend tens of hours arguing about cga, file dispute tribunal with more hours plus fees. For a hundred bucks at Harvey it's no big deal. But I've never negotiated anything successfully at noel Leeming so I don't bother when I buy there.
There are some benefits of a warranty such as those that you've listed. I'm not totally against them - if people are willing to pay extra for one they may make life easier than a disputes tribunal case if something goes wrong.
In this case once again Noel Leeming have failed to comply with the requirements of the law and provide a summary detailing the benefits the cunsumer will see of the extended warranty vs the CGA. To say an extended warranty is essential is also very dodgy.