I can’t tell if you’re upset for humanity or for nature. A lot of people are worried about nature and it always seems short sighted. As you note, mass extinction is a part of nature. One day or another another asteroid would have come or a supervolcano would have exploded and all these species would have gone extinct anyway. Nature gives life but it takes it away just as easily. There is no perfect state that exists that we are wrecking. Our wrecking the world is very much in line with nature. We are no better or worse than what the world and the universe had in store for these species.

Now, if you are talking about what’s ideal for humans and your concern is our future, that I can understand. But keep in mind that we have reverted many crises before, and we are in the midst of dealing with this one. We are a very clever species and when finally faced with the effects of our actions as we are now, we can find solutions. Climate change effects will take decades before they can cause global collapse and we will adapt and go on. We will desalinate, we will carbon extract, we will geoengineer if we have to but humanity will be fine (+/- a few 100 million)