The reconstruction of the dinosaur DNA was a bad idea as people can't control the nature and it surely went wrong. Now they are free and this island is in dinosaurs possession.
The idea of the Jurassic park failed all dinosaurs that were selected with the help of modern technologies are free now. Considering how dangerous they are, the decision of making the island the restricted area was right and nobody was allowed to enter that location. However, you should maintain the peace of close lands, so the plane is were send to see what is happening there.