This is a great example of Chesterton's fence.

Predators keep population numbers low. Which prevents overgrazing, which protects the environment, which ensures herbivores can survive.

The Yellowstone park's reintroduction of wolves is a pretty good example of it.

It's really just arrogance to assume we need to or should interfere with nature, but I appreciate the good intentions and don't mean that in a negative manner.

Humans can also make themselves sick on both carnivore and plant based diets. We are still just beginning to understand the complexity of how diet relates to health.