Agree with you C441.
No one is Forced into commuting.
If you know your bidding for a PER based 787 slot, then you understand that the greater majority of flying will be ultra long sectors.
The longest Qantas has ever flown. At the end of 18-19 hours of flying the weather can be less than optimal in the UK and Europe. Even if you were Perth based you'd Be tired enough. Having flown an additional 5 hours from the East Coast on day of ULH operations would be unprofessional in my opinion.
I'd be very surprised if new FRMS rules would allow this. You'd have to respect Qantas right to enforce this too.
Any incident and I think you'd be toast. Aren't Perth hotels cheap now anyway?