+lots to many of the above comments.
Broome may not have been an authorised airfield for the type involved..we fly over that part of the world in a big twin and it is certainly not authorised for us...(and yes, I know that consideration goes out of the window if the fit has definitely hit the san such as a fire and/or smoke.), Darwin is a way off and may have had weather issues....The Alice OTOH may have been the best fit given circumstances (which we won’t get from flight radar and/or the Twitter sphere).