Why is it important that our species survive longer than Earth? Honest question. What's nihilistic about liking Earth? All my stuff is here, all my friends are

Why is it important that our species survive longer than Earth? Honest question. What's nihilistic about liking Earth? All my stuff is here, all my friends are here; the food is good. Whether intentional or not, the first question implies that the extinction of the human species would not be a bad thing. The second question is a non sequitur. The accusation of nihilism has nothing to do with liking Earth, it has to do with the apparent indifference to human survival.