This makes at least 4 episodes of Quantas Airlines failures in the last few months. This is smelling like sabotage. Quantas needs to hire a security firm. Ever hear of this from El Al? Nope.
Statistically your supposition is plausible.
More likely is not so much OVERT sabotage but shoddy PM work or LOTS of FOD from the airports they serve.
I’ll go with FOD coupled with poor inspections.
No, they just need to switch brands of engines, and dump the current ones to create artificial reefs for fish. You only read about the RR engines having catastrophic failure on the 380s.
They need to check the people who have access to their aircraft, not just the mechanics, and look for names like Mohammed El Arabani and then hire a security firm.
But the is a different Rolls Royce engine on a 747 not on an A380.