That they seemingly didn't even consider it is exactly what I'm highlighting. I'm not raking them over the coals for it or anything, it's just a mild observation; I'm not about to pull a Hermione and go found the goblinoid version of S.P.E.W. or anything.
Keep in mind that these are the same writers who were extremely thoughtful over the kind of summary dismissal and discrimination Tieflings would be facing in a place like the Sword Coast. The writing team is excellent.
What I'm saying is that I'm happy that we're able to recruit Minthara on a good playthrough without cheating or modding anymore, but you're still forced to metagame to do it. I find that unsatisfying; you may not care, and that's fine, we can agree to disagree. I think they could have killed two birds with one stone without much effort here though.