Even though I am a pessimistic doomer, I like your hands-on approach to an optimistic future. Thank you for that. I'm a tech and farmer when it comes to futurism, and I think the resolution to true sustainability comes down to whether humans contribute to the future resources of their environment or just continue seeking various forms of net extractive and net polluting processes and behaviors.
Unfortunately, if we wait for pricing (blind, unfettered competition) to set the agendas, the only people who gain in the near term are those who set prices (ownership society).
To me, I think keeping tech around to make life better is just practical application toward better behaviors, rather than the belief that technology(and by association, secular science/humanism) is the cause of our consumptionist mentality.
It's not about growth/degrowth, but about useful contribution to the resource bases we will need. Of those resources, there are physical, natural, artificial, human and political (stability, cooperation, law abiding institutions) aspects that we have, until recently, mostly taken for granted. Now we are starting to see that the Invisible Hand is really a fist, but very few, if any of our leaders know any other way to solve big problems.