Sadly I no longer live in the GOC, but other than at school where we dissed westies, zoobs (people from non-surfing areas), Parras etc, I never really encountered that attitude.
There are still people out there annoyed (e.g. my mother) that the Cahill govt replaced a two lane opening bridge with a four lane opening bridge at the Spit. Everyone (on both sides of the Spit) wanted a high level bridge.
Just think, if the Northern Beaches tram lines (something older GOC residents remember fondly - e.g. mum again) hadn’t closed in September 1939, and the whole tram network had been maintained and expanded post-War, with Cahill and co. seeing to a high level bridge at the Spit - we wouldn’t be having this discussion.