Well even walkable cities are car centric, and will be for a long time, so it's only logical that a game set in a strange "now" will be like that.

You'd need to have something like future Anno time line or what simcity touched (although only with like single buildings) to change that. And even most fiction is not about changing cities to remove cars, but changing cars (blade runners 3d roads, self driving in minority report etc)