I am sure the perfect safety record of CX come from the vast variety of background and experience of the flight crew.
Make it all French and you become another AF.
Make it all local and you become another KAL or Asiana.
Make it all American and your SOPs mean nothing.
Make it all German (or Oz) and there goes your CRM
Etc...
I've got more stereotype if people don't feel offended enough.
All cultures and educations have their strengths and their flaws.
What you want is a good mix of them so everybody benefit and learn from their colleagues' strengths.
I will truly miss that diversity.
No other airline in the world come close to CX in that regard (except maybe EK).
Unfortunately, it seems that safety doesn't matter enough anymore and the risk of having a hull loss is acceptable and accounted for. They will, as always, blame the individual and not the system that created him.