He's not spot on. Not only are people fucked, but so are tens of thousands of other species, ecosystems, and so on. And we're the cause of it.
There is no baseline metric of what defines the planet as being fine. The best metric is the one in which the planet's systems proceed at the pace they normally do, which is not occurring right now.
Nope. If you look at the planet you can find life everywhere. Dosen't matter how harsh it is. Life is everywhere. No matter if it's cold, warm, no oxygen, high pressure..... The planet will do fine long after we are gone.
If it's our time to go, it's our time to go. The planet will do fine without us
Study up on ecosystems, ecosystem services, and biodiversity.
It doesn't matter if we find lichens and bacteria in Antarctica. Our goal isn't to acknowledge that if we radically render the planet into an inhospitable place for megafauna, we will still have bacteria and heat thriving nematodes on the planet.
Please read again the last paragraph of the post you're responding to. I'll quote it for you:
There is no baseline metric of what defines the planet as being fine. The best metric is the one in which the planet's systems proceed at the pace they normally do, which is not occurring right now.