Pilots and other workers get 42 days a year leave because they work shift work, back of the clock, and work weekends. Holidays are a moot point.
Irregardless this is a landmark ruling. Qantas are worried. So much so that the chief pilot’s had to put his name to a letter from legal asking you to work during holiday periods. Hazard a guess other airlines and industries also.
As others have suggested airlines are going to have to start remunerating people properly for working holidays, providing confirmed travel for family etc.
The chief pilot still gets 42 days a year leave. Perhaps he can put his hand up.