The Night Mammoth wrote...
They want materials.
Organics have materials in their bodies. Apathy is a real d*ckhead, sometimes.
BioWare seem to be going more along the lines of synthetics just not liking us that much. I have no f*cking idea what that means.
Because expending energy on the conflict, losing individual members of the AI race to said conflict, and still needing to spend time and energy harvesting said resources is so much more efficient than just taking them directly from asteroids and gas giants, right? It's easier to avoid dealing with organics and just harvest readily accessible materials in space than to attack inhabited worlds. If an AI is just a machine, it will go for the most efficient solution. Least risk, least expenditure, biggest reward.
There are asteroids in our own solar system which individually contain many times more gold than the entire Earth's estimated total reserves (which includes everything we have, the mines we know about, and scientifically sound estimates about what we have yet to discover). A single, typical iron-rich asteroid could supply the entire planet's need for the raw metal for somewhere around 10 years. Water, carbon, silicon, helium, hydrogen, metals; they all exist in huge amounts in places where war isn't necessary for a space-faring race to access them. So what benefit is it for synthetics to wipe us all out? As the OP said,
LucasShark wrote...
It's a sisyphian task, with no possible profit or motive, and would only consume resources to eliminate threats which don't actually exist and may never exist.
There's little to be gained in attacking organics. The simplest explanation is that they fear organics. The Reapers are so advanced that they don't consider anything to be a threat, or at least this is what the Catalyst would have us believe (though I think Star-jar crapped his holo-diaper when Shep got up to that chamber, but that's a topic for another thread). If a synthetic race was able to outlast whatever threat its creators presented, they are likely advanced enough to not be threatened by another organic species. And once that happens, there is no reason to seek open conflict with organics, unless the synthetics fear us.
But all of this is made irrelevant if the Catalyst can be taken at face value, because its action refute its statement. After a billion+ years, why hasn't the purely synthetic Catalyst orchestrated the demise of all organic life? Perhaps it's because it knows it can't, or it is openly lying. In either case, the Catalyst's logic breaks down rather quickly at this point.