
With the greater capacity for harm also comes a greater capacity for flourishing. It’s a basic debate in utilitarianism. Is the universe better with trillions of happy clams, who lack advanced consciousness but live contently, or is it better with beings who experience suffering, but have greater capacity to enjoy the positives of life.
I would argue we haven’t existed sustainably alongside every other creature. Small-scale hunter gatherer societies drove the megafaunal extinctions of the end Pleistocene. The species that survived then adapted to human presence. But that is the result of any highly competitive species entering a new ecosystem.