Everything's fine as long as it's voluntary. And by voluntary I mean both not compulsory (mandated by some level of government) as well as not normalized to such a degree that virtually every electric provider independently offers no other option. These types of things have a way of worming their way into our everyday lives; I imagine I'm not the only one who is wary of loss of agency from this as well as other similar things as the Overton window is dragged farther and farther away over time.