I dont really understand your objection.
Yes, the GST is great, etc., etc. What we're complaining about here is that Amazon appears to be refusing to collect Australian GST on the huge range of products in their overseas stores; instead, they're outright refusing to ship these to Australian customers. We can't get them even if we were willing to pay the extra ten per cent or, indeed, for any price through Amazon. It seems that Amazon is trying to aggravate Australian customers to spite our federal government.
Still, I'm not completely sure that the gloom and doom is all justified. The wording suggests that at least some of the products from international stores will be available via the Australian Amazon site somehow.