I think you’re missing the point that the majority of l companies don’t care about the quality of what they release. Large pro consumer companies like Valve and Lego (I couldn’t think of any others video game related), who might be willing to let their bottom line fall in favor of improving relations with the customer, seem to be very much in the minority. For most others, the only thing that’s important is how the bottom line is affected. Starfield, for all its flaws, was the #11 bestselling game of 2023.
Now, you could be onto something when you mention Bethesda’s poor track record, and how that might play into ES6’s release. If they keep making disappointing games, maybe there will be a “boy who cried wolf” type situation where, since Bethesda keeps making disappointing games, no one will want to buy ES6 by the time it comes out. Personally though, I don’t think that’s very likely. The reality is that many (if not most) consumers don’t even know who makes the games they buy, nor do the look into the other games that company makes. And for the ones that do, more still probably don’t care. I think no matter what there will be a sizable amount of people who see Elder Scrolls 6 and go “Hey, I liked Skyrim, this’ll probably be great!”