As discussed elsewhere, in the EA, I and many other people, immediately assumed they were the tadpole and would never have trusted them. They used all the literature/media language of being a lying manipulating villain, it was too on the nose. Fantasy romantic partner in your dreams? yeah that's evil manipulating I don't trust.
Now the Guardian? ONLY YOU CAN SAVE MANKIND? heroic war, you need to do your part, appeals to heroism and suggestion of a greater mystery? it adds nuance, it's not too trustworthy, it's not completely lacking of any ability to trust it. The guardian can be read both ways, they are still lying to manipulate you, it's just now there is the possibility that the player (and possibly you given you say they are too trustworthy when I and many others don't trust them) can fall for that manipulation in a way they never could in the EA
