Elyiia wrote...
I don't think a clarification is going to be enough. If we say that IT isn't actually a thing, then we have an ending that sticks out like a sore thumb if you played ParagonShep. It doesn't fit the character for him/her to blindly accept what the kid is saying. ParagonShep would have argued with the kid's points at the very least and RenegadeShep would have told the kid to "f*** off".
You're forgetting a couple of things though.
1. The Catalyst is thousands and thousands of years old.
Choosing the form of a child was a poor choice I think. It caused people to view the Catalyst as a child, with the experience of a child, as opposed to an entity that is millenia old.
However, the Catalyst knows more than Shepard. The Catalyst has been around longer than humans have existed, longer than Asari have existed, longer that Protheans have existed. The Catalyst has eons of evidence to back up what it says, while Shepard can only present the weak arguments of a species that has been on the glactic fron for less than three decades. Shepard has absolutely no position to argue from. The Catalyst has seen it all before, and has seen where it eventually leads to.
One could argue that the Geth are a sign of synthetics and organics coexisting peacefully. However, that one would be arguing only from the experience of a couple hundred years. The Catalyst has doubtless seen this before. What makes one think this cycle is so unique and different from countless others?
2. Shepard is in no physical condition to argue.
Shepard was hit by a Reaper beam, if I'm not mistaken. When he gets to the Citadel, he is in horrible, horrible shape, barely able to shuffle along. After the encounter with the Illusive Man, he tries to stand up straight to reach the console and falls to the ground, eventually having to pull himself up by the console. If he can't even stand straight, if he collapses right after, what makes you think he's in any position to have a philosophical debate with an eons old entity?