Any food you want as long as it's seafood

Just heard that one of Cheung Chau's non-Cantonese seafood restaurants may close before long. Hasn't been open a real long time.
Hardly an uncommon tale: someone opens a different type of restaurant here, the food may be decent, but after a while, it's bye-bye. Nepalese, Italian pizza, Malaysian, Thai ... the list goes on.

So what is it about Cheung Chau and non-Cantonese style seafood restaurants? We have plethora of seafood places, a smattering of dai pai dong type joints, a very few doing something like western, but not much else that works for long.