Monopoly is about market share, how much market share do you with your unlimited wisdom expect that amazon would have in Australia? Remember 5% in the US excluding food, home base of operation, extremely low cost, high population number. How much do you think? Bigger or lower than that 5% in Australia, way higher cost, low population number and smaller e-commerce portion of sales? Give me any country that amazon has any monopoly in?
You are projecting your reclusiveness onto others.