Well its kind of about the food-chain which the lions are apart of and are on the top of but its about respecting the chain and keeping it in balance that was on of the themes and its about how we all are connected through this never ending cycle. I think In the movie they talk about how over hunting was bad and led to the pride lands being destroyed so yes the lions did eat the gazelles and zebras but they didnt over hunt them in the movie. How can this link to real life well take a look humans are the reasoning for the extinction of many animals so you can see the reasoning for the movie