The price of flights to Melbourne has to be very high to make it profitable to also fly to Adelaide with <10% seats. You could say the people really demanded it

The price of flights to Melbourne has to be very high to make it profitable to also fly to Adelaide with <10% seats. You could say the people really demanded it. I agree that this loophole should be closed, but maybe the way to close it is to just allow flights? I don't have a strong take, the original regulation must have been put into place for some reason; but it has a very real cost (which the passengers are happy to pony up for).