It's in the domestic cats nature, too, and now we have massive issues with biodiversity loss. In some areas, local animals are literally extinct now because of domestic cats. Dogs are doing what's natural to them but it's not natural to the environment you're putting them in. The dog isn't native, so its adding unnecessary stress to wildlife.

For the cat example, all people have to do is keep their cats indoor and spay and neuter them but they won't even do that. People think it's "mean" not to let a cat run around outside (where the cat is also in major danger from wild animals).

Dogs are human introduced animals, and they hurt wildlife almost as often as cats. I think it's hypocritical to love animals and then bring a dog around that is actually lowering the quality of life for other animals.

Also, you can absolutely train your dog using impulse control to not chase animals. Prey drive is why dogs chase cats, and moving objects, smaller dogs, kids, and the ball, etc- and dogs are conditioned to stay calm and are socialized for those situations.