The primary reasons given for the delays in removing cancelled flights from sale included to give staff time to establish alternative travel options for customers; to avoid further blowouts in call centre wait times and in some cases human error. was to remove from the customer the option of quickly choosing to take their business elsewhere.
Fixed that for you Qantas.
Or, remember, we've already got your money, and we'll be the ones who decide how, when or even if we'll give it back.