Humanity's continued exploitation of not only the planet and animals, but also each other suggests that they do more harm than good. Humanity kills, rapes, starves, and harms each other and the planet to an increasing degree with each passing day.
While there is less violence than their once was between humans, we now butcher more than 50 billion animals each year for food and products.
Not only is the yearly loss of animal life more than 6 times the human population, but the climate cost of animal production is destroying the future of the planet.
If humanity were to disappear one morning, the loss would be far less significant than the cost of continued human exploitation of the planet and its inhabitants.