>humanity can use forerunner technology because they are forerunner.
vs.
>the Librarian implanted a species-wide geas in them that gave them an instinctual ability to operate Forerunner tech so that they would one day inherit the Mantle. She did this when Forerunner society was nearly extinct much and no one could actually stop her from doing so by that point.
343 is even chickenshitting on their own lore now by saying that humans and forerunners could share a common ancestor lol. Too afraid to even commit to their own retarded lore.