This is a really childish, uncultured view. Surely even you want to be more than just an animal grazing on the field and leave a legacy behind you can be proud of. You only have this one chance to make a mark on the Universe, however small. People in the future might be looking, either through archaeology, or it's advanced version that let's them observe the past in some way, if it's possible. Who knows maybe the past is measurable from the future. Who knows the Universe maybe a collector item and aliens keep dibs on it's inhabitants. This could be all a game. Of course this is all sci-fi, but the point is that our potential is not meant to be wasted.