all the cool things

And the second response was “I’m happy for them.”

I suppose that yes, there are possible scenarios where human lifestyles prove fundamentally incompatible with a key element of nature, leading to its destruction, and some humans still survive—but the key terms there are "some" and "survive."

And even in less critical scenarios, like the long-term conservation and reintroduction of particular species, the consequences of "the alternative" are bad enough that "the alternative" shouldn't be on the table in the first place.

"If we reintroduce wolves, they'll kill livestock!"

And? What are we proposing to mitigate that problem? How are farmers being compensated for their losses? Are you leading into these questions? I'm waiting.

If you are simply expressing that you would like to live in a world where wolves don't exist, I would like to live in a world where all of the rain drops were lemon drops and gumdrops, but sometimes reality is not what we would like.

The ecosystem of the eastern USA is in shambles because of the absence of large predators. The deer overpopulation is contributing to a tick explosion, which has led to great increases in Lyme disease and the spread of other, nastier tick-borne illnesses. Chronic Wasting Disease is spreading rapidly, rare plants are getting browsed out of existence (which in turn affects insects and birds, which affect each other, the plants, and everything else) and the herbivores themselves are in great suffering.

"How are humans going to coexist with wolves?"

1. It's "limit" and "cut down on the unnecessary cosmetic maintenance of" lawns, not "get rid of" and 2. I don't know, let's figure it out.

"If we have to get rid of light pollution, how do we do without outdoor electric lights?"

1. It's "limit," not "get rid of" and 2. I don't know, let's figure it out.

"If cars are bad, what about these problems with public transportation?"

1. It's "car-dependent infrastructure is bad," not "all cars should be crushed by a hydraulic press" and 2. I don't know, let's figure it out.

"If insecticides are bad, what about—"

Tl;dr