My understanding is that a major cause of America's burgeoning healthcare burden is the food environment. The argument I've heard smarter, better informed people than me make is: If healthcare were nationalized, it would incentivize the government to help fight the battle against itself in the context of unhealthy agricultural subsidies and policies. When the government subsidizes farming corn on a massive scale, and…
That's only one factor. Another is car dependence and lack of pedestrian-friendly built environments.
There is a lot of research on just how much harm it does us to sit all day, every day. We sit in a car to make a long commute to work. We sit our desks. We sit in the car again.
And hitting the gym occasionally doesn't fully compensate for living like that.
Urban planners used to configure cities to help promote physical health and we don't do enough of that anymore. It's nigh impossible to escape a sick outcome when trapped in a sick system that makes healthy choices largely out of reach for most people.