I guess we have different standards for 'irrelevant', because to my mind if something has a potential game long presence and a dedicated possible ending it's not irrelevant.
It's a shame, because I think you could have very easily made a version of that quest for an evil player that didn't cut the Tiefling refugee plot short. They're going to end up in Moonrise Towers if you save them anyways
Funny for him to start ranting about smart evil, since Gortash's entire plan is absurdly dangerous and basically doomed to failure even if everything goes right.