I favor public education, but let's not kid ourselves, there is not a polity on earth where degrowth would get more than 20% support. It's a weird social media echo chamber artefact that will exclusively sabotage efforts to decarbonize.
There's a lot to gain from just efficiency it doesn't have to be degrowth.
But forever growth also isn't sustainable. No matter how productive we are, the planet would still not survive.
> there is not a polity on earth where degrowth would get more than 20% support
Eh, I'm not so sure about that. Sustainability politics is mainstream in Europe in a way it isn't in the US. Aside from ethical concerns, a lot of people over here see climate change as a very real economic threat (likely to cause them material economic harm within their lifetimes).
You're probably right that a general degrowth strategy wouldn't ever be popular, but I bet a policy that say restricted AI and cryptocurrency with the aim of reducing electricity prices would be.
In a sane election system, 20% gives a party a significant position in the government that influences the coalition and drives some of the future decisions. Just not in the two-party circus.