I appreciate the idealism but that's an incredibly naive take. The idea of "just walk" or "just ride a bike" or "just move" or "just grow your own food" is nonsensical when talking about US infrastructure. Humans have limits and those that are at the bottom of the economic status, the ones who would be affected the most don't need another self imposed hurdle. Their lives are already hard enough as it is.

There was a solution and it involved beating the corporations into submission before they ever amassed such a massive amount of power. This idea of endless growth needed to be stopped and society needed to transition to a more sustainable way of living. But it's honestly too late. Corporations are made up of people but those people aren't in control.

The most impactful action that a single person can take is to not have children. Let the population drop and kill all demand. Thankfully cooperations are making this choice easier than ever.