The way I see it, no matter how bad things are, it won't distract me from the fact that every good thing matters. If not for me, if not for other people, then people who will come after. I'm only one person, but at least trying to do my part and being grateful for the things I have and receive, be it friends, a bed, food, a roof, a fun moment. And I can still accept the terrible state of so many things also.
Or in the words of David Graeber: "The ultimate hidden truth of the world is that it is something that we make, and could just as easily make differently."
You all are forgetting that cats live on this planet too!
I mean, kinda hard to say without context. Are these aliens even compassionate? How smart are they and what's the reason for blowing it up? etc.
If I can't argue how fucking stupid it is to destroy the entire planet, I might become a fervent earth-destroying zealot and undermine their efforts through my utter incompetence.