The issue is that Human / Awoken Origin Stories were nixxed and the only version of the origin story used is the Exo one. This is due to the whole debacle between Bungie / Activision a year before release that ultimately led to the departure of Destiny's lead writer Joe Staten. Here's the quote from the reddit post "All of the Last City factions had their storylines and dialogue cut, the Guardian's initial introduction to the Tower and the Last City was cut, and ALL the origins were homogenized down to the one originally used for Exo characters." Source: https://www.reddit.com/r/DestinyTheGame/comments/2hrpzx/ama_request_someone_from_bungie_or_activision_who/ckvowy2 Blame Activision