It is not what-aboutism, it is about high statistical probability of ruined immersion applied to players with a certain mindset, which is not applicable to role playing games, but more to books and/or cinema or visual novellas, where there is no interactive elements and therefore high demand for a certain level of logical coherence. Broad strokes are in place in BG3 and they make sense. The specifics of the genre allow plot stretching and interpretive thinking and justify some of the smaller plot holes. If BG3 was a linear visual novella with a set protagonist, plot coherence would become much more crucial. But BG3 is an RPG with a high emphasis on replayability and changeable characters. It is not that kind of game that "plays itself" but the one where you are free to justify your leadership as you see fit, according to your character's lore. I am all in for more dialogue options to help me project that lore onto the world, but it has nothing to do with other companions being interesting and unique. They are unique, yes, but they are also flawed. And that is what makes them interesting and not at all Mary Sues.