Cause, it is the only thing that can be done efficiently (Hydro, Nuclear or Other); and as all low life politicians wanting to get out in front as if they are leading, see their chance. For the last 25 years the U.S. political class has soaked the public with non-nuclear and can no longer do so because unless we sell the advancing countries Coal/Oil and for them to burn Coal/Oil we derive a benefit, something they do not want to do. China has committed to the biggest single Hydro-electric system to date, plus going nuclear and will be self-sufficient by 2025!
But again that makes too much sense. Who slipped the Thorazine into Bummer’s cocktail?