This "if you're a real rugby league fan you'll want Cronulla to survive" stuff is nonsense.
As a rugby league fan, I want Parramatta, Manly, Canterbury and Souths to survive. That is, clubs that actually add something worthwhile to the rugby league landscape. Clubs that contribute significant juniors, heritage, history, geographic presence...
Cronulla offer absolutely none of that.
I'm happy for them to stay if they actually add something worthwhile by relocating to an expansion area. Sydney is congested at the moment and the Sharks are prime relocation candidates, given they are geographically swallowed by St George Illawarra.
Cronulla, unlike the clubs mentioned above, are a giant ball of meh. In fact, sometimes I forget they are even in the competition. Then I remember, and I laugh for a little bit.