Do you think that's what he was saying? I admit I don't exactly hang on to G'raha's every word, but my reading of that scene is that he was saying that while the thought was tempting, it ultimately doesn't address the pains he's felt about the dead: he doesn't actually wish to talk to them again, he wishes that they hadn't died. And Living Memory doesn't actually solve that, it's just a tempting 'close enough' that may well only leave the wound to never heal.
FFXIV's had a lot of stories about necromancy, either literally or in essence, and I think the main thing they have in common is the central message of a 'sympathetic no': that yes, it's understandable to want this, and that you might even be better off for having explored the attempt, but that it will never be right: the cost will be too great, or the victory won't be complete. Living Memory's honestly only different in that it got further along than most other attempts, most of the others either failed before anything could get revived or shortly after they thought they succeeded. There's absolutely a connection to be made with Emet-Selch's, because that was also a necromancy story, but it's not that we're him; it's that we're staring down the hollow specter of Amaurot that he would've made if he'd gotten any further. And yeah, it hurts to have to hold to the same answer we always had even in this situation, but I really think it's supposed to.
Also, I feel like we're underselling Namikka and Otis' parts of that zone. I think they exist there to tell us that we aren't shutting down lives and futures full of promise: we're looking at people who are happy (or at least accepting; Otis' relationship to his life seems more complex) to have had the lives they did. We're not cutting off their golden years, these are people who've already lived their lives, and don't have anything left ahead of them but reliving it.