If the people that say they support sustainable living actually understood what is meant by that phrase almost none of them would support it. It’s not just billionaires giving up their jets as is the popular notion, but as you point out, basically giving up everything Americans consider staples of middle class life.
I think we’ve got a better chance inventing a giant machine that removes greenhouse gases from the atmosphere than we do of convincing people to follow your way of life. And climate change is just the tip of the ice berg.