Here are some possible elements of a social conflict, which can factor into its resolution:
*What is at stake, from the PCs' (and hence players') perspective, and from the NPC's perspective;
*What moves the GM is permitted to make for the NPCs they are controlling;
*To what degree the PCs are able to risk, or preserve, whatever it is that their players have put at stake in respect of them;
*How decisions made during the course of resolution, both by players and by the GM, factor into outcomes.
Until we know how a particular social conflict system incorporates and expresses these various elements, we have literally
no idea whether or not it permits the GM to dictate the players' goals.