The reality for those involved in any sort of work disturbing the normal waking-sleeping cycle is that not only is quality of life reduced, quantity of life tends to reduce substantially.
That Qantas need a new fleet is axiomatic, that the regulatory limits for the long overdue aircraft do not permit its planned tour of duty requirements,
ought concern both pilots and cabin crew for that there is zero reputable science supporting its adoption.
If labour organisations and regulatory bodies alike were actually concerned about health effects any consideration would include a long term health study.
The 'studies' Qantas are undertaking are neither sufficient in scope, scale nor time to even be considered anything but marketing.
That the industry permits any change to the current hard limits without science is troubling, that the regulator fails to demand it a concern and that people do not appreciate the long term damage it is doing to them a huge concern.
https://www.theguardian.com/books/20...-walker-review