Not the answer he'd have guessed. But all right, if the physics of the larger universe that embeds Earth and dath ilan permits superluminal travel, the Great Silence is vastly exacerbated as a question thereby. Combine that with something superintelligent probably having passed by Earthsystem and left magical eclipses in its wake. Then if Earth has not already been invaded and consumed, externally originating invasions and consumptions are perhaps prohibited.
This moderately reduces the chance that Earth is going to erupt with an unstoppable horror that eats dath ilan. It is still something that the smart dath ilani will be very concerned about, given their current total lack of comprehension of many, many Additional Questions. It is plausibly something that dath ilan would invade Earth over. It is not necessarily something that dath ilan will invade Earth over, given that there is a chance dath ilan will not be annihilated.
"Forgive me the sudden line of inquiry. My own first thought was that dath ilan is - most likely to behave in a manner that might be termed impolite and abrupt - if it seems like your world is about to completely annihilate our own, even inadvertently. However, if FTL is possible, it is moderately less likely that you can accidentally do this to us, because then aliens would have been more likely to have done it to you already. You speak of humanitarian interventions by dath ilan; I take it that Thellim has already forecast cases in which she thinks we might wish to so act?"