I'll make kind of absurd argument, but how is nuclear not competitive with dying? You could always tax the shit out of fossil fuels and they won't be competitive. You could also make other laws that punish fossil fuel usage with death penalty since you could argue its a crime against humanity. I mean, law is an abstract construct. This is a live or death situation. Even if we need to abandon 30 years of economic growth for the sake of surviving, then maybe it's what we need to do.