Something being "interesting" or "important" can only be judged by (somewhat) intelligent beings. It is unlikely that the rest of the (not intelligent) univers

Something being "interesting" or "important" can only be judged by (somewhat) intelligent beings. It is unlikely that the rest of the (not intelligent) universe cares anything about us. Hence, it does not follow that we should preserve life or even intelligence. However, I think evolution had made us into systems that frantically try to procreate. I consider that a valid enough reason to continue preserving life. But note that the reasoning is different.