Who is departing a CTAF IFR inside or outside VHF coverage without making a call on both CTAF and Centre and the inverse who is inbound IFR conduction an arrival without having made those calls?
Its complete unreasonable for any charter pilot to be wasting time circling over head to an en-route lowest safe on departure when there is a perfectly safe on track alternative. Given everything an IFR pilot has at their disposal you should be fully aware of any obstacle on your departure track. There are very few strips in aus that would require more than an overhead departure to maintain a safe terrain clearance.
Even if you depart on track with a "steep" climb requirement, at 120kts you still only need 600fpm.