I’m a firm believer that human consciousness is a huge cosmic accident. Kinda like Matthew McConaughey’s monologue from that one scene in True Detective. Except far, far less cynical, and maybe without the part about humans choosing to voluntarily go extinct. Great scene though, great scene.
More to the point: not only do people exist, but we’re painfully aware of our own existence as somewhat autonomous entities. We aren’t particularly amenable to going through mechanical, preprogrammed motions as effectively as say, an ant. We get bored easily. To keep ourselves entertained, we ascribe higher meaning to things and give ourselves purpose.