Nothing that I've said contradicts your point that management and regulation matter.
You're subscribing to an either/or dichotomy which is false. Consumers demand drives emission. The fix is to enforce heavy regulation on the producers which will ultimately result in lower demand through increased cost.
CO2 emissions are only ONE of the environmental challenges we're dealing with. We're resource bound in other ways, and regular ol' pollution of the environment is a huge concern which sometimes run contrary to CO2 emission. Meaning you can have a technology that reduces CO2 emission in production, so you consume more and throw away more. That is good for climate change but still bad for the planet.