I've read a theory like this before it seems the most plausible. Essentially you have two people who know the truth, the stranger and the speaker, so both speak for different sides, traveler/not traveler, so it really implies that one of them is misleading you. You must have died fighting the fallen though that's the only reasonable explanation, further proof of this is that the awoken happened because of the collapse and the exo were made to help fight the darkness, which in my opinion supports your theory a whole race was created got fighting? That's just sorta shady. But either way you could only have existed after the fallen were attacking so maybe your death was actually before ghosts and the travelers incident but you were still a soldier, which is why you were just ready to fight. I completely believe the fallen are evil though, the vex the hive the fallen and cabal are all fighting for control, against you and against each other. I also think it well be likely that dark might come into play with armour and that will be your choice which would actually limit you to a new social hub so maybe not but that's later for sure.