The sun will destroy earth in 2-5 billion years. But before then, an asteroid will likely destroy all most/all life on earth in the next couple hundred million years or so. And before that, a super volcano will likely destroy most/all of the animal and plant life on earth.

Assuming human technology advances fast enough to avoid catastrophic climate change and MAD succeeds at keeping us from destroying the earth ourselves , we're the only species that has a shot at making any "not-human-centric ecosystem" survive beyond earth.

(ignoring any life that may exist outside our solar system)

Of course, 22 Billion years from now the entire universe might die and kill everything anyways, but we may end up giving Bambi & friends a few billion years of existence they wouldn't have otherwise had. So I'd call that a net gain.