Converting an scientific issue into a political (or better say an emotional) one is only needed if the science does not support your side.
Therefore it makes sense for deniers to move from a scientific discussion (which has largely been lost) to a political/emotional one, where things are more flexible and a good presented bad argument might still enable you to win.
So why should the "green energy industry" move the debate from a science driven (which pretty much supports their argument) to a political one?