alt Hacker NewsIt is actually a very good example, IMO. It shows that it is possible to offload important parts of humanity onto machines - and that it is, in such a case, also necessary to pay the costs of that offloading.
Bearing the burden of a civilization-wide illness such as obesity and diabetes is such a cost. But, hey, at least a large amount of the country is designed in a way that mandates commute via cars and makes "adding to one's lifestyle simply for the purpose of wellness" even more inconvenient.
The predominance of cars (and the alternative of mass transit) doesn't do anything to change the fact that some technology or technologies have scratched walking from many people's list of central activities, and that some people who have seen the ill effects of this change have found another, more or less corrective, place for it. I take that to be the author's meaning, and I agree with them that this would be a sad diminution of a fundamental human practice.