It is tragic that species go extinct. I believe 99.99% of all species in earth's 4 billion years has gone extinct. I forget who said it but like individual creatures live and die, species also have to live and die. But it also opens the door for new species. Without mass die offs, we don't have dinosaurs. Without mass die offs, we don't have mammals and humans.
> All that concentration of local entropy, destroyed forever
And look at what the previous destructions created. The beauty of today's nature stands on the graveyards of the natural world that came before it. Those species you mourn today only existed because previous species went extinct and open up the space for other species.
Not saying we should welcome species extinction, especially the ones human cause. But we should be mindful of the fact that past species extinctions is why the current species exist. It's not all one sided. There is "life after death".