Yea, its kinda odd the Guardian didn't ask about it, but, from the developers standpoint, it would mean much more work as they would have to do it for the Exo and come up with something for humans aswell (which would of been great, but they decided not to sadly). Guess they can just say your Guardian was more worried about the task at hand instead of their own backround. From a lore standpoint though, its perfectly plausible.