Bro
I have to say I don't believe the entirety of human civilization and achievement, and every last human on earth, deserves to be wiped from existence because some of us now are recklessly destroying our planet.
But beyond that, what if it's not even us that destroys life on earth? If an asteroid or comet or solar flare ends life on earth did we all deserve it?
To put it in Kantian terms, a backup to civilization is a categorical imperative.