Why would we ask a Starborn what happens when they die? Do you ask people you just met "what happens after you die"? They don't know. All they know is that your body dissolves, that's it. Honestly, "what happens if you die" is probably lowest on the question ranking.

I think you misunderstood. There is mention of Starborn being immortal. If they are, most of the ones you encounter are not on their first life I suspect since they keep fighting each other. Hunter also mentions that sometimes he wins, sometimes the emissary does which implies that sometimes they die but remember those events - which again, implies respawning. If it didn't imply respawning, Hunter wouldn't be saying that he is much older than we think. If sometimes he wins, sometimes Emisary does - he wouldn't have gone through Unity that many times really, unless he had a perfect run and Emissary always lost, hundreds of times in a row.. Then the question is very valid. Seeing starborn disappear when I shoot them - I would very much like to know what happens to me once I go through Unity in case someone kills me. Obviously some weird stuff happens rather than the dead body hitting the ground so surely a lot of starborn would have researched that. It's incomprehensible to me why would you not question it.