This is not a sustainable solution to population level health needs, even if maybe in your particular situation you do actually get enough vacation days and free time on weekends to be able to do this (I also doubt this).
For me the competing requirements are space for gym equipment and space for a workshop. I could have space for both if I lived further out, but then all other aspects of life would get worse. I'd have to drive constantly, to work, to social outings, to fun weekend stuff, it'd be a drag.
As you are pointing out though, we all have our tradeoffs we make. My only counterpoint would be that most cities are doing a terrible job of offering options to people who do want the more dense, "less car" communities.