I think this is a deeply flawed and simplistic categorization of Americans’ political sentiment. “Progressives” capture a broad swathe of people with different concerns and intents, very many of whom are doing just fine but appreciate the myriad systemic issues that merit address. Keep in mind, Republicans have effectively turned being focused on the existential threat that is unchecked climate change into a “progressive” issue and part of their culture war.

Moreover, political spectrum positioning historically shifts only one step one way or another between generations (i.e., children are usually one step more centrist than their parents when they settle into a stable political outlook). What this means is that most people just don’t give significant thought about their politics and their practical and lived impact on their lives. This isn’t to say most people are stupid, but rather they are thoughtless and myopic. It also means that a very large portion are not reacting to anything-- they’re just bumbling along like humans always have and it’s the incidental cascade from flapping butterflies here and there that cause the population level swings and societal changes we ultimately see.

You are making the same mistake that economists (used to and some still do) make in that you are baking perfect rationality, at least along some axes, where it just does not exist. And trying to build any sort of model from such a flawed axiom is doomed.