To clarify, according to Bostrom, it would be an indicator of our lower chances of survival (raises priors on Great Filter being in our future rather than past)

To clarify, according to Bostrom, it would be an indicator of our lower chances of survival (raises priors on Great Filter being in our future rather than past). The act of finding out if there is life or not will probably raise survival chances on net, compared to never looking. Much like passively looking for the monster in the dark room. The monster is either there or it is not, but if you see it you have better chances than if you don't (barring some specific contrived scenarios).