outnabout
It is my understanding that not all inter-hospital transfers are for patients who are in a critical condition requiring specialist medical attention on the flight.
Unless things have radically changed in the past few years, there has been a centralisation of medical services statewide to Perth.
e.g. Any labour pre 36 weeks is flown to Perth. No, not critical in your words but the way the health department play the game. But whilst you're already going to Perth, why don't you take someone who's of less medical priority along as well? Be careful how you read statistics.
And you need an understanding of the way things work. Currently, if you have a pickup in the Kimberley to Perth (read above) and if you can't do a swap half way down with another crew, then that's a crew and aircraft overnight in Perth. Which leaves the Kimberly short staffed and an aircraft and crew on the ground for the next 12 hours. Then the Headland crew has to cover for there… and on it goes. Something with speed and range (i.e. the jet) will prevent this from happening.
PS. Take what some others have told you here as fact. They know.