"Allows them freedom"? From my viewpoint, that is straight up newspeak. Which is also a point to be made, our respective frames of reference is so diverse I'm hard pressed to think we would ever use the same language to describe any form of housing. Only in America is walkability a problem in low density areas. Presuming your definition of "low density" isnt rural, of course. And if we are rural, I have a hard time seeing how that can be defined as a sedentary lifestyle. Going for a walk is not usually a problem in those settings, either.