I'm not talking about the elevator. I'm talking about the OP.
However, regarding the elevator....I fail to see how the explanations at the bottom of page 1 are 'digging'. They're quite sensical.
Honestly, I've yet to find to find an explanation that still doesn't account for "He Can't" or "He Won't" within the context of the Star-Child's explanations. There have been a few good answers, but they simply don't make sense within the game's narrative cohesion.
Let's go over a few popular ones:
1) The Star-Child can't physically act on his own.
That's what I'd think at first since he is a hologram. But he's also the most advanced and oldest AI in the galaxy, he's also integrated with the Citadel. Just because he can't physically act on his own, that doesn't constitute being unable to directly act on his own. For example, even though the prothean scientists sabotaged the keeper signal between them and Sovereign, but the keepers still directly respond to the Citadel (aka Starchild.)
What's stopping Star-Child from signaling the keepers himself?
There's also the clear stated sentence, "The Citadel is part of me." And that also includes a hidden Mass Relay to Dark Space where the Catalyst's army of reapers wait to enter the galaxy to wipe out organics so that they're not wiped out by synthetics.
What's stopping the Star-Child from activating the Dark Relay itself?
It makes no sense to believe that this Star-Child would purposefully design the Citadel and lock himself out of the loop. Even if he wanted to keep a low profile, its ludicrous to believe that he'd design and build the entire Mass Relay network and the Citadel and make it so that he can't control anything on purpose. That's the equivalent of if I were to build a huge mansion and left town without ever keeping tabs to make sure that it wasn't vandalized or looted. Also, the Star-Child's activation of the elevator and his apparent deactivation of the Crucible in the Reject Ending clearly show that he can exhibit control over the Citadel.
2) Star-Child didn't want to be discovered.
Both in-game dialogue and codex entries note that the Citadel was meant to be the perfect trap. Easily accessible and livable enough to be the center of a galactic community, but with only the keepers fully understanding how it's detailed insides. That was part of the Reaper trap and why they were so efficient at wiping out civilizations before they knew what had happened.
In fact, while the protheans (a civilization far more advanced than the current cycle) eventually discovered the reaper cycles, they were also just as oblivious to the true purpose of the Citadel and were massacred for it. The only reason that this cycle even got a warning was because the scientists sent out a coded message through the prothean beacons, but it was a message that could not be understood without a cypher. Furthermore, that message was only meant to be a warning about the Citadel itself rather than the Star-Child. Even Chorban's research was merely further confirmation of the reaper cycle and there was no mention or hint of Star-Child in his email.
My point is that these tidbits of information along with the Catalyst's own admission that Shepard is the first organic to ever encounter him since the cycles began clearly shows that the Star-Child was in no danger of being discovered. Even if he was, by the time he activated the Dark Relay by himself, the reapers would pour in, destroy the center of government and the rest of the galaxy would be wiped out by the reapers while the silent puppeteer plays Galaga. The galaxy becomes empty, the holo-brat goes to take a nap and the keepers clean up the Citadel for the next cycle.
3) Hubris
I'm not going to dispute the notion that the Star-Child is prideful. But Pride doesn't always equal stupid and if the Star-child's existence were to be accepted, then it's clearly a very intelligent AI.
In fact, it's too intelligent to let an easily fixable glitch exasperate into a larger problem that threatens to undo his cycles of extinction and the greater synthetic-organic problem. The plot would never be able to happen if the Catalyst had applied common sense and undid the prothean sabotage or just activated the Dark Relay by itself. But if we're really going to accept Hubris as the reason why the Star-Child didn't activate the Dark Relay by itself, then that's pretty much admitting that the entire trilogy is based on a contrivance.
4) You're just a hater who wants to bash Bioware.
Oh no, I'm done beating the dead horse. I'm just surprised as to how many people overlook this plot-hole. To be fair, it wasn't one that I didn't notice until I replayed the series after the EC and it's stuck over since.
5) It's really just a minor problem that you're exaggerating.
I disagree. This isn't a minor nitpick that you can hand-wave. Bioware's inability to address and resolve this conflict has pretty much attached a dead-weight to whole series which causes the entire plot to collapse in on itself.
As I said in the OP, Sovereign's actions are what kickstarted the entire plot of the first game and in connection, the entire series. The prothean's sacrifice was so effective that Sovereign became desperate to correct the problem through any means necessary and this rippled into other events like: The Rachni Wars (Sovereign indoctrinated them), the Genophage (Direct result of actions taken during the Rachni Wars), The Geth problem (Sovereign's recruitment of the Heratics only exasperated the galaxy's distrust of them) and Saren's indoctrination (Directly leads to Shepard's rise in reputation and power).
Then in the last five minutes of the series, it turns out that the entire plot is based on an artificial contrivance. Did the Creators really expect us to believe that the Reaper's creator lived on/was part of the Citadel for the entire time and never did anything to stop us or even reveal itself until now?
This is why the clear majority tie most of the problems with the ending to the Star-Child. If you simply erase the Catalyst from this ending, then a large portion of the ending's problems would likely disappear with it.
Then again, it's only a game. I'm just the kind of guy who gets really irritated when something clearly stupid is being waved in my face and the person waving the stupid thing in my face is telling me that it isn't stupid. My suspension of disbelief can only be stretched so far and Star-Child is where I throw up my arms and install the MEHEM.