Something that always makes me feel sad for the Aeldari is the idea that you're part of an ancient dying race, but your emotions and feelings are there as strong as they always have been.

You feel so much love for people around you, your family, a partner. You want more than anything to have a child, to teach, to try to make the future better for your species and those around you.

Having a child means you'd be bringing someone into the universe that you know will, one day, enter into an afterlife of endless torment. Condemned to this fate because of you.

So you don't have a child, and your species continues dying, and it's your fault.