Attrition is no headache for EK, nor is refilling the voids.
The problem is already here, namely quality of applicants and those who eventually jump through the hoops and loops. If the western companies need more pilots, it will not be by poaching back the ones that left, but to keep the ones they have and the newcomers. That's where the A and B teams will be in the future, leaving the C+ for the ME and Asia.
EK does not bother, as has been said, they calculate coldly that they can afford one or two smoking holes.
Listening to the radio and reading all the FCIs and ASRs recently makes you wonder if those writing have ever had something called aviation common sense. But be assured that by writing that bs, they pave the way for a star and will then diligently propagate their infinite wisdom.
That's the danger for EK, not the attrition.