BG2 only takes a few things from the previous game and throws out the rest. I haven’t played Dragon Age, but Mass Effect and Telltale infamously had “the choice diamond” where they respect your choices up until it has to eventually lead somewhere, so they all end up funneling back into only a few options. These are just different ways to dress up the same problem. Fallout the TV show does exactly the same thing as Fallout 2 did to Fallout 1, which is the same as your Dark Souls example: it’s set far enough in the future that you’re unlikely to run into anything contradictory.
BG2 only takes a few things from the previous game and throws out the rest. I haven’t played Dragon Age, but Mass Effect and Telltale infamously had “the choice diamond” where they respect your choices up until it has to eventually lead somewhere, so they all end up funneling back into only a few options. These are just different ways to dress up the same problem. Fallout the TV show does exactly the same thing as Fallout 2 did to Fallout 1, which is the same as your Dark Souls example: it’s set far enough in the future that you’re unlikely to run into anything contradictory.