Grandma doesn’t want to share those stories because it hurts to talk and she can’t see well and just generally she’s in a constant bad mood because her life sucks.
All of this is beautiful stuff, but I think it no longer applies when suffering has removed a person's humanity such that they can't offer these things anymore. At that point they're only capable of putting their energy into suffering. Even your attempts to alleviate their suffering are probably useless, or offer little to no relief.
I don't see why you would think about or hope for these things when they're effectively gone; especially not if wanting these things for yourself is at a loved one's expense.