A move can do one of two things.
Kill the club or help the club.
Moving to North Sydney Oval will do nothing for the club, and if crowds don't show up across the harbour, they'll be in a worse financial position than playing closer to home at the SFS. It could make things worse (and what could be worse than how things are at the moment, we saw that in seasons 2000 & 2001).
Moving to Gosford may upset people... but it would ensure the future of the club. A new begining, a growing league city, a near endless supply of juniors, with the Red and Green jersey running around, with that great Rabbitoh logo. There'd also be a nice $gift from the NRL for relocating.
If they are going to move at least pick an option that is worthwhile, or stay home.