I think it's a combination of factors. One is, it's easy to get trapped in a cycle of not moving and becoming increasingly weaker and fatter, but the other is o

I think it's a combination of factors. One is, it's easy to get trapped in a cycle of not moving and becoming increasingly weaker and fatter, but the other is our toxic lifestyle of high stress. Lots of people are making subsistence incomes because they can barely survive the low pay out there in society. They are exhausted and don't have time to walk, which loops back to one. It's true though, many places don't have sidewalks and there are many drivers that like to swerve or act threatening to anything that is not another truck, so this also plays a role in disincentivizing people from sharing the road.