There's two things that are simultaneously true: 1) improving efficiency of electricity use is often the most cost effective use of a dollar. Better insulation, more efficient appliances, etc. are choices made purely on financial merits. 2) We're going to need to greatly increase electricity consumption in order to decarbonize.

People working on the grid and in utilities are coming at this from a completely different perspective than degrowthers, in my experience. Grid ops are extremely conservative, and utilities have not adopted new tech in decades if ever, so they look at the trend of the past decades and think "the future is going to be exactly the same." They are not thinking of the grid change we need to deal with climate change, at least in the US.

I only have deep understanding here in the US, but the "degrowth" subfaction of progressives are completely ineffectual, despite being very loud. They have zero influence, zero ability to organize into any sort of group with influence, and little desire to do anything except critique others. They can be safely ignored, because even their critiques are based on either very fundamental misunderstandings of the world, and they can only infect a very tiny subset of the population with their mind virus of ignorance.

Perhaps other places, like the UK, has a more politically effective group of degrowthers. But in order to even believe the things they believe they have to dumb themselves down quite a bit so if there are politically effective degrowth movements it may be time for me to reevaluate my position. Anti-vaxxers are far more effective politically, despite having just as poor critical thinking skills, but with the anti-vax movement individual action has big impacts, unlike with grid decisions.