Not an expert but I do deal in reality and if you follow the history of humans it all get’s laid out and easy to see. Unless it feeds us or warms us it’s pretty much useless to our existence. In many cases it can actually compete against us such as some of our larger predators. Early humans killed every one of them they could.
We no longer need birds to protect crops from insects, we can do that.
We no longer need predators to control many of our critters such as elk, moose or deer, we can do that.
As I said before, some species exit only because we allow it. No species can stand up to the onslaught of the human species. There’s a reason some are protected and other have certain seasons and bag limits. I’m on a 42 square mile ranch every day, over a years time I’ll kill a couple of hundred Ravens a year. They will wipe out a doves nest, kill baby quail and kill baby cottontails. All are considered a food source for humans. They have also been know to kill lambs and blind calves. North of town some of the farmers have annual Crow shoot’s when their migrating. A little beer, BBQ and spend the day wearing out the shotguns.
Have fun in that chemical, mechanical, dog-eat-dog world that you seem to think is eternally our earthly condition - which perspective I hope doesn’t prove to seriously bite you or your descendants.
We have evolved in our science and understanding since the times when we ‘killed everything we could’. Eventually, we will evolve to realize that there is a Natural way to address everything - as long as we take our overweening egos out of the equation.
Human beings are really still pretty stupid - every time they reach a certain level of scientific understanding, they think it’s the ultimate. They make all sorts of mistakes on that basis, and then later are proven wrong by further science.
Of course, the ones trying to further the science are always persecuted and shut down - for a while.
And then everyone decides that it was their idea all along.