Hear, hear. Something that comes close to to how I feel about us killing our biosphere is a quote from Paul Ehrlich: "What we're losing are our only known companions in the entire universe".
I am so enchanted by all of the weird little lifeforms we are supposed to be sharing our world with. All their amazing intricacies, beauty, and evolutionary history. All of it (but especially birds! Birds are my favourite). It's so alien to me that people don't give a shit and, to the detriment of everything else, only care about looking inwards to other humans.
That was a ramble! Quite sleep deprived and loopy over here.
I think about this a lot. I think a lot of people simply don't care. It's just not something they think about. This ties in with feeling entitled to taking everything the planet makes for humans. Unfortunately it seems to be how a lot of politicians think. Which I suppose makes sense, as what could be more anthropocentric than fucking politics?
I can't comprehend it, but then I remember that there are people who feel the exact same way about the view that the planet doesn't just belong to humans. We were supposed to share :(