But bundle of rights is High Court law:
Is an air ticket a right to fly or only a bundle of rights to fly?
That article provides you with a good overview.
Consumer law does come in to play, as stated in the article. The case being discussed there is from 1975 - but still holds. In the case with the ACCC, the issue of the ‘bundle of rights’ did not come in to play. What was important was that Qantas had cancelled flights in their system, but continued to sell seats on those flights. That could be considered deceptive or misleading, and something you can’t do under consumer law.
But even today, your ticket is still a bundle of rights. Provided the airline provides the service in a timely manner, provides a product that is fit for purpose, and isn’t being misleading… like selling tickets on flights that don’t exist, nothing much has changed. And it’s not just qantas, it’s every airline.