Only? No. Mostly? Yes. For at least a couple of reasons. Because we humans seem to be the only creatures that have ever existed that have even been able to pos

Only? No. Mostly? Yes. For at least a couple of reasons. Because we humans seem to be the only creatures that have ever existed that have even been able to pose the question of what makes Earth "important". That level of consciousness is special and worth protecting and expanding at all costs. It's more special and magically generative than any other creature that we know to exist or previously exist. Because Earth without us is a dead man walking. The complete extinction of all complex life on this planet is already baked into the future as the sun expands and boils the oceans in 0.5-1 billion years. It seems to me exceedingly unlikely that any other spacefaring civilization will emerge after us if we fail. Even if you think other forms of Earth life are more "important" than us, the continuation of our human civilization is the only chance this other life has at having a longer existence (on other worlds) than this baked in timeline.