It has nothing to do with the type of cooking you're doing. Generally, when adding cheese to a seafood dish, it tends to make the fish taste "not so fresh" and the one thing you always want to present when cooking fish is to serve the freshest fish possible. Generally, it's the use of melted cheese in these dishes. I'm with other posters here - if you like it - eat it - I don't think there's anything wrong with a little parmesano reggiano on the dish. Manga!