Humans may have totally over taken the planet earth but that doesn't means that we are the owners of this planet. Being the most intelligent species comes with responsibilities. We have urbanized this planet. n other words we have destroyed the home of many species. Biodiversity is way more important for our survival than we realize. We should let other live if not for them but ourselves.
As a higher being of this planet, we should be taking care of it and norturing it even though we are not the owner of it. We have been living on Earth for a long time, and we have been consuming all the things that Earth has to offer. It is just right to atleast take care of it.