First of all, I'm not born here, had always thought that Aus would be similar to US or other first world countries when it comes to consumer rights and freedom.
I'm geniune curious as to why there is such a huge difference to shopping experience here to US.
I'm sure everyone has experience shopping around and choosing between products, searching online and having some guy on the internet telling you to just buy both and return the one you don't like. That guy is most likely from the US, and you'd reply that you can't do that here…
What's the story behind this? why can't we have a more relax return policy from retailers? (or am I not shopping at the right store?)
As far as I know, change of mind returns mostly apply to unopened items in original packaging, I can't tell if I like a TV or speaker if I haven't tested them out…
It depends on the store, some do allow change of mind returns. Some charge restocking fee, others don't. Some don't allow change of mind returns at all.
The answer to your question is purchasing volume power. Australia is a very limited market compared to USA and it's a lot more challenging to absorb returns costs at a smaller scale.
You could ask the same in reverse for video games, why do they drop in price rapidly here vs USA? There just isn't enough demand buying them post-launch so they reduce price to shift them. Not the same issue in USA with much larger market population.