WHERE IS SAINT STEPHEN'S GREEN PARK?

Yes I know where it is! Top of Grafton Street in Dublin 2. However, the question still stands. Why don't Irish films use the park as a location? A few do (Adam and Paul, Leap Year) but most do not. Look at most New York movies. They have no problem using Central Park as a location. From Death Wish to the latest rom-com there is always a scene set in their park. So why don't Irish films use our famous park? Is filming illegal there? Why won't the Film Board include the park in their promotional trailers? Surely it's easier to access than the Cliffs of Moher? Shame that a great film location on our doorstep is being underused?