I suspect that it was included in order to add a little humor and to keep aspects of political correctness in our collective consciousness. Shortly after the tour of the park begins and before they have seen any dinosaurs, Ian Malcolm reflects on the irony of what Jurassic Park has accomplished. God destroys dinosaurs. God creates man. Man destroys God.
Man creates dinosaurs.
Malcolm clearly mocks God by indicating that not only does man declare God irrelevant, but also proceeds to duplicate God's creative capability by creating dinosaurs all over again. We are as smart and as powerful as we once thought God to be. God is no longer needed. While the movie was not openly hostile to religious views, Crichton clearly intended to marginalize theistic views of origins with humor, sarcasm, and an overload of evolutionary interpretations. If there is one thing the history of evolution has taught us, it's that life will not be contained.