Gargantia on the Verdurous Planet and the Relationship of Man and Machine

By the end of the series, we've seen three distinct possible futures for humans: the cybernetic, militaristic, robot-like people of space, the free-form but technologically stunted survivors on the planet, and the post-human Hideauze, who have (depending on your interpretation) abandoned technology altogether, or been consumed by it. Plus, we see these groups interact is several different ways between characters and groups. But what does all of this actually say about the effect of technology on humanity, or are these effects caused by something else?