Sure, I’m not arguing that people shouldn’t upgrade their insulation. I’m just arguing that it’s not going to have an impact on global carbon dioxide emissions, which is what’s relevant in a discussion about climate change.
If you really enjoy your hobby of increasing your household’s energy efficiency, then go for it. Be the most efficient cat on the block. I support your lifestyle choices!
If you have any reason to dispute Jevon’s predictions, though, I’d love to hear them. It would be really surprising to me if decreasing a price did not cause a corresponding increase in demand!