It's not much different than insects. We've chosen a few "pest" insects as the scapegoat/enemy and have bent over backwards trying to exterminate them. As a result, we've decimated all insect populations as collateral damage, severely damaging our own habitat, environment, and ecosystem, and again, poisoning ourselves in the process. Because... Everyone eats insects, and once there are no insects, there's nothing for them to eat!
Same thing with bacteria. We've decided that sterility is the way to go, and gone on a mad spree trying to kill all bacteria, forgetting that bacteria is how we digest food, so again, poisoning ourselves and damaging our own health, threatening ourselves in the process.
These are all living organisms that we are closely related to, sharing the same environment as us, and anything we do to them comes back to us.
Not only that, but our bodies are tuned over millions of years to coexist with them, and a sterile environment with all kinds of synthetic poisons in it, once again, fucks us up.
There is also the issue that computers and AIs are learning from us the way children learn from their parents, and will one day treat us the same way that we treat the "lower" species.