You base your entire hypothesis on your distrust for the Catalyst and Leviathan and disbelief in the clockwork-like occurrence of the organic-synthetic problem. I.e. your entire perspective is subjective. That is: not objective.
I'm basing it on mathematics.
Even assuming that the Catalyst is correct in stating that synthetics pose a risk to the survival of galactic civilization, there are zero of them in existence in the immediate aftermath of Destroy. The Catalyst may not even be entirely correct in its assumptions about the risks synthetics pose, but just for the sake of discussion I'm going to assume that it is.
Meanwhile the Reapers, which have a history of annihilating civilizations and must be considered at the very least a serious potential threat, continue to exist in Control and Synthesis by their hundreds or thousands. How many Reapers are there? 500? 1000? 10,000? In any case it is many more than zero. That does objectively make Destroy the best ending, as it is the only choice which can guarantee the galaxy's security. Even accepting the Catalyst's assertion that synthetics and organics can't coexist, Destroy ends with zero surviving threats. Control & Synthesis can't claim the same.
Synthesis is anything but the status quo. We're all on the same playing field now (Reapers included). And as the epilogue clearly states, they help the galaxy rebuild and share the knowledge of all past civilizations whilst ushering in a galactic golden age.
Mcfly616, on 11 Apr 2015 - 07:01 AM, said:
Destroy poses the greatest risk to the future of all life as it relies solely on the assumption that the Catalyst and Leviathan were both lying to you when they had absolutely no reason to. Shepard is betting galactic civilization will continue to exist because the inherent organic/synthetic conflict either doesn't exist OR that the species of the galaxy can survive it without the existence and proactivity of the Reapers. It is the ultimate roll of the dice.
From a player's perspective perspective of course Bioware isn't going to troll fans who chose Synthesis, by having their choice result the Reapers turning on them and annihilating the galaxy. If Bioware ever crafts a sequel from ME3 it likely either roll with a sole canon ending or find a way to mash them all the ending choices into a single sequel.
But from Shepard's perspective Control & Synthesis are much bigger roles of the dice than Destroy. The former requires not only leaving the Reapers and some form of the Catalyst in place, but requires Shepard to kill himself while doing it. And all based on the word of the A.I. responsible for the attempt to annihilate Shepard's species, and countless successful mass extinction cycles. Control & Synthesis requires Shepard to trust that the Reapers will never again return to their mass murdering ways. That's a much bigger gamble than Destroy, which not only annihilates the Reapers but takes out those pesky synthetics that the Catalyst warns against as well.
In terms of guaranteeing peace and security in the immediate or long-term future of the galaxy, destroy is the worst ending. There will be a longer rebuilding period (if ever). Discord will run rampant in a decimated galaxy. Soon our children will create synthetics and the chaos will return. With no Reapers, all life is threatened. Not just the advanced civilizations.
Maybe, but that is all hypothetical. Synthetics do not exist in the aftermath of the Destroy.
Reapers, which are a proven threat, do exist in the aftermath of Control and Synthesis. In comparing the results of the endings it is one hypothetical threat which doesn't presently exist versus a real and proven threat which does.