Do people really play Beth games for the narrative? Admittedly, I haven't revisited any of their games since Skyrim, but I do think fondly about it as this very low-level simulation game, where you get to wander around nordic looking terrain, kill some random enemies, or get stomped by trolls into the stratosphere. Magical shouts and help some not-vikings beat the not-romans (or vice-versa) and all that. Very simplistic, but fun if you turn your brain off. Being a bit drunk while you play it probably helps.
Like yeah, they aren't deep RPGs, but if you want some open-world Isekai where you get to mess around with very shallow fantasy world, it's great. Starfield seems to bring all that into a sci-fi setting pretty well. The actual space exploration part seems super basic, but I am not sure why anyone was expecting Beth to make a game like Elite or something. Even if they were interested in something that deep and complex, their fans would just hate it or not touch it.
I think it's the complexity and deep mechanics and freedom of choices in BG3 that get's me. Starfield is a good game, but lacks the complexity that BG3 has. Starfield feels very basic in many ways. But I like basic RPGs too, so it's not a big issue.