Good points.
Adaptation is a trait built into virtually all forms of life, and, if a climate is not conducive to a good environment for any particular species, that species tends to find a route to other environments which are better suited. The environmental movement will always disregard those points.
Also, when anything becomes extinct , other, perhaps more suitable, replacements spring into existence.
So, how much damage was caused to the environment when the dodo bird disappeared from the planet? What about the dinosaurs and the sabre-tooth tiger and mammoth? Did the world cease to exist? Was it harmed beyond repair?