In other words, this is yet another angle from which player choice was irrelevant this Arc.Yes, we don't get to vote on what NPCs outside of the Dynasty do, that's just part of this being a Quest.
And speaking of choices, big part of them in the ending of Salkalten was very much driven by the attempts to prevent Tullaris from getting to the Arc. From having to enter this exact scenario. They failed miserably because dice, because Tullaris rolled better. The lietmotif of this entire situation at this point may as well be, "choices don't matter, learn to roll good , scrub".