i'm only up to Io, but one thing that is bugging me *SP* (Destiny)

by ManKitten, The Stugotz is strong in me., Tuesday, September 12, 2017, 14:09 (2411 days ago) @ Schedonnardus

so I'm only up to Io (haven't played Io yet), and it's really bugging me that I have met up with the vanguard, but have not shown them how to get their light back. They are just like "hey, cool, you have your light" ikora even says to the effect (paraphrase) "you will survive, but we wont"

why can't i show them how to get their powers back? Am I the only true guardian worthy of regaining my powers (don't answer that)?

This was discussed briefly in the Spoiler thread down below. I asked the same question but an answer was never really noted and I am hesitant to express my theories as it seems you are early in the campaign?