While this may be true for you, and for a limited number of others, I strongly suspect this is a case of "what the customer says they want is not the same as what they'll pay for".

While we might like the idea of luxurious travel at a gentle pace, in practice the though process that will happen is:

  * I would like to go to Australia
  * I have 2 weeks of holiday
  * In order to maximise my time in Australia I shall take the fastest travel I can afford