God, what a load of shit this argument is. Animals have been seen killing for fun and sport as well as vengeance at times. All animals without their regulatory controls of predators will absolutely wreck their ecology. We don't breed incredibly fast. Without our modern society and tools we'd be lower on the chain as well. If another species achieved sapience like us they'd do the same thing too. The only complaint you can make is the number of people who seem complacent in just fucking things up as opposed to being better. Hardly makes us a pest.

We where destroying ecosystems long before the invention of money.