Ok, I'll set out my own climate credentials. As a "left leaning progressive" of the economic standing you describe, I've lived most of my adult life in apartments less than 800 sq ft. All of the furniture in my apartment, save my bed, is off Craigslist or from consignment stores. I've commuted by bike or public transport for most of my career and when I've had a car commute, it's been under 20 minutes - by design.

Pre-Covid and parenthood, I took one or two flights a year mostly to visit family. I think I've taken one pure pleasure trip overseas in my entire life. The only animal flesh I consume is chicken, maybe 3 meals/week. I buy carbon offsets for everything else.

Given all that, I'll still take the other "left leaning progressives with 5000 sq ft homes" over the people who deny that there's a problem at all. At least the progressives vote for politicians who'll do something. The other guys will consume the same amount as the limousine liberals, but their politicians won't do shit.

If we keep hoping for everyone in the world to start living like you or me, the world is doomed. Carbon taxes and other big actions are the only way. With carbon taxes, people will automatically pay extra for their massive homes and jet setting lifestyles, or be priced out.