However, with a random allocation system in NSW, there's no guarantee you'll get into RPA or RNS. So it's not an exact science on where someone gets allocated. And you inevitably will have trouble networking compared to your counterparts who have been in metropolitan hospitals for the whole two years.
Bankstown/Campbelltown is more the exception rather than the rule here - all of the other Sydney hospital networks will have a rural secondment that has enough placements for you to do a year, so if you're planning to do intern year in the city and resident year in the country you don't necessarily have to get RPAH or RNSH.
I do agree that it is a disadvantage in networking if you are going for a metro position (which the majority would find desirable).