bgroberts wrote...
Arguing anything from Shepard's point-of-view against the Catalyst is committing the type of academic sin that should get you an “R” from any self-respecting professor or instructor. The Catalyst has been at this for 20,000+ cycles for at or above 1 billions years. His sample size and sources are so enormously vast beyond any cycle's experience that Shepard's indication of the Geth or EDI are of no consequence. You are holding up an exception to the aggregate, and also an exception with no guarantees of continuity.
The Catalyst's solution is based on an assertion. Obviously all organic life has not been wiped out therefore his assertion that synthetics will wipe out all organic life is not based on fact. It's based on what he thinks might occur. Not necessarily what will occur. Not by any reasonable standard of evidence. He was created by organics in a galaxy where organics obviously existed and had the means to prevent extinction. Oddly enough it is the Catalyst itself that wiped out its creators. Ironic perhaps?
Many find the reaper's motivations ironic.
Given what we know, I don't see the Catalyst allowing organic or synthetic civilizations to develop to a point where AI's could wipe out organics. The reapers certainly didn't do this in the prothean cycle or the current one. In every cycle the Catalyst's toys performed the destroying. So his mountain of evidence may be a dirt pile he saw 37 million years ago. A dirt pile next to the hole it dug itself.
It strikes me as self contradicting. Organic species creates AI to figure out how to stop conflict between synthetics and organics. AI does not solve conflict, but in fact starts it and perpetuates it. Mind boggling.
It's not even the argument for conflict between synthetic and organic that is the problem. The problem is his "solution". Why is genocide the best solution? Why can't the reapers just police the galaxy under a somewhat iron fist like the Control ending? He could run a intergalactic zoo. But, no, he chooses to do what he is supposed to prevent.

The conditions to form life are limited. At some point the galaxy is going to run out of planets that can produce life. His solution can only lead the the extinction of all organic life in the galaxy.
Sorry, but the Catalyst is all kinds of flawed. The Catlayst would work better as a disfunction organic-AI blending experiement gone wrong. Not something working as intended.
If I was the writer I'd take a metaphysical approach to reapers. Everything Soveriegn said in ME1 made the reapers to actual be something beyond the physical object in front of me. Something from a high plane of existence interacting with the physical world via the machine forms. This seemed more likely to me when it was revealed that they used organic parts in construction (i.e. a "gateway to the soul"?) Heck, maybe they didn't want the competition if other races evolved to a point where the supernatural became the natural. Maybe religion and worship feeds them like the Ori in Stargate and they need to keep their cattle from becoming equals. This could be a reason that could be explained.. yet never truly explained. Oh, well. I'm not the lead writter so whatever.