Spoilers for Mass Effect 3 follow
I always disagreed with people that claimed that the SYMBIOTIC ending is the worst one. It is the only ending in ME that saves the galaxy, appart from continuing the cycle, exterminating humans,but letting the next species live. The thing about the Catalyst is that it is trying to do its purpose-Save life at all cost. If you choose the Destroy ending, destroying all the reapers, you doomed all organic life to extinction. The organics will build AI, and the AI will become so powerful that it will eventually wipe out ALL organic life.The CONTROL one is doomed to fail by default. While you are controling the reapers, your thoughts didn't evolve. You are still a mere human, easily corruptable, just like the Illusive Man.
The Reapers eventually kill 99% organic life, so that the sapient species don't make an AI that wipes out 100% organic life. And the Catalyst admits itself that that solution is only semi-perfect. The reapers don't exterminate the sapient life, they harvest them and their wisdom to create a new reaper.The catalyst hopes to get enough sapient minds so that it can make a perfect solution to perserving life.
Now this is where the Symbiotic ending comes to terms
It esentially brings the pinacle of evolution to all life.The organics become enchanced by the mechanic parts, esentially becoming perfect,and the syntetic AI gets organic traits, leading to understanding aka them becoming"Alive"
It ends the possibility of the organics building syntetics that exterminate all organics, because there aren't anymore "syntetics" nor "organics",they all become"symbiotics"
Now before you say that it's a paradox, that life has been exterminated by "symbiotics", you have to realise that the "Symbiotics" are in fact alive, so it's a permanent solution to perserving life, and that's why the Reapers stop attacking and help the newfound "symbiotics" rebuilt their civilization.
I always disagreed with people that claimed that the SYMBIOTIC ending is the worst one. It is the only ending in ME that saves the galaxy, appart from continuing the cycle, exterminating humans,but letting the next species live. The thing about the Catalyst is that it is trying to do its purpose-Save life at all cost. If you choose the Destroy ending, destroying all the reapers, you doomed all organic life to extinction. The organics will build AI, and the AI will become so powerful that it will eventually wipe out ALL organic life.The CONTROL one is doomed to fail by default. While you are controling the reapers, your thoughts didn't evolve. You are still a mere human, easily corruptable, just like the Illusive Man.
The Reapers eventually kill 99% organic life, so that the sapient species don't make an AI that wipes out 100% organic life. And the Catalyst admits itself that that solution is only semi-perfect. The reapers don't exterminate the sapient life, they harvest them and their wisdom to create a new reaper.The catalyst hopes to get enough sapient minds so that it can make a perfect solution to perserving life.
Now this is where the Symbiotic ending comes to terms
It esentially brings the pinacle of evolution to all life.The organics become enchanced by the mechanic parts, esentially becoming perfect,and the syntetic AI gets organic traits, leading to understanding aka them becoming"Alive"
It ends the possibility of the organics building syntetics that exterminate all organics, because there aren't anymore "syntetics" nor "organics",they all become"symbiotics"
Now before you say that it's a paradox, that life has been exterminated by "symbiotics", you have to realise that the "Symbiotics" are in fact alive, so it's a permanent solution to perserving life, and that's why the Reapers stop attacking and help the newfound "symbiotics" rebuilt their civilization.