Sorry, disagree. What's the relief crew there for?
Have you ever flown international before?
Crossing multiple time zones and landing in a different hemisphere from where you departed has a very negative effect on your circadian rhythm. Having a "relief crew" does not necessarily mean you will get adequate or quality rest, if any. You could (and will) be landing when your body tells you, you should be sleeping. You see the sun rise when you feel like it is time to go to bed. It is something we all encounter flying flag operations, but we do the best to mitigate the negative consequences. Fatigue is a contributing factor in this accident.