Have you read Eliezer Yudkowsky and the LessWrong forum on AI existential risk? Your understanding of the sheer scale of AI and taking it seriously as a critical risk to humanity are common qualities shared with them. (Their focus to address this is to figure out how to make AI be built aligned with human values, so that way it cares about helping us instead of leaving us to fend for ourselves or actively killing us.)

(The Fermi paradox is also the kind of thing discussed on LessWrong.)