Rykoth wrote...
You ask the question of why would Shepard listen to this entity....
Why wouldn't he at this point?
*snip*
Well... what would you do if you've been through the emotional and mental hell only to find out that again, you have to make a dire choice? Would you say "no" and risk the end of your species? Shepard's has never once backed down from making a hard choice, why would he back down now?
I don’t know what I’d do, I haven’t been through emotional and mental hell, but I sure hope I’d have the ability to recognize whether I am talking to a friend or an enemy.
So let me summon my Shepard, who has, as you point out, been through that hell, and provide her perspective.
So she got there, expecting to find some kind of switch that would turn on the crucible and hopefully end this nightmare. She still doesn’t know what the crucible does, but she trusts Hackett’s judgment enough to go with this plan. She is pretty convinced her best friend and her lover are dead, so her personal safety is hardly a concern.
Instead of an off switch however she finds a glowing hologram/ghost/whatever that tells her literary this: “The reapers are my solution. I control them” and offers three options at least two of which make no goddamn sense.
I, the player, having played through once and having watched all other endings on Youtube know what happens when she chooses either. She at this point doesn’t.
She only knows that the entity responsible for every advanced civilization that ever existed being wiped out wants her to shoot a tube/grab some handles/jump into a beam of light. Not to mention that the starchild promises that every choice will destroy the mass relays. Even if she was to believe that wouldn’t cause supernovas all across the galaxy, that effectively destroys what she had been fighting for – galactic civilization. She also knows that the reapers' favorite strategy involves setting elaborate traps for organic civilizations.
Let me reiterate that.
The only confirmation that these options will stop the cycle is the word of the being that claims to have started the cycle. So the answer is no, she would not go along with the plan of her enemy. She would rather put her faith into the fleet she gathered, and if that fails – into Liara’s time capsule and the next cycle.
That’s from an in-universe point of view.
From a player point of view we have the following:
We are being introduced to a character that came out of nowhere, manages to produce more plot holes in 5 minutes than the whole collector plot of me2 did over 30 hours, contradicts itself within 30 seconds of appearing on screen and forces us (if we want to finish the game) to accept one of three nonsensical options that contradict previously established lore and themes of the series. And I’m not even going into the philosophical implications that go with all this, because I still am not sure whether those were intentional or someone simply didn’t think this through.