knowing what we know of the aeldar's physiology, neurology and psychology as well as their culture it seems pretty obvious to me that besides having extremely heightened emotions (compared to humans) and hence also an extreme heightened psychic potential (or perhaps the relation is in fact the other way around) they ALSO have an effectively extremely heightened empathy (maybe not by design but as a result of the aforementioned traits).
their extremely strong connection to the warp makes them very open to empathic and sympathic experiencing of the emotions of others (like the pseudoscientific concept of "empaths" irl) which ALSO explains how the Drukhari manage to directly replenish their soul and lifeforce from causing suffering and pain in others.
i see the Drukhari pain-eating as an inversion of what i would refer to as the non-Drukhari hyperempathy/psy.empathy.
and the way that the Aeldar treat the rest of the wide wide galaxy out there with a raging superiority complex and either patronizing "guidance" or downright genocidal dehumanization (funny term in this context) doesn't in any way invalidate this concept because while heightened empathy would be inborn for them even humans irl are VERY capable of reframing whole groups of people as undeserving of basic rights, empathy and sympathy.
so the Aeldar have built in hyperempathy and their cultural "coping strategy" is to only treat "their own" as deserving this while societally teaching the systematic devaluation of everyone else.
it'd certainly be a lot harder for them to cope with the whole everything and the way they treat everyone if they didn't blanketly view everyone who isn't Asuryani as being worthless.
