alt Hacker News> how the automobile age made it unnecessary to walk
Given how little Americans walk and how much blame their sedentary lifestyle has gotten for obesity and diabetes and so on, i don't think this is a good example.
EDIT: If anything it's something of a counter-example: of an activity that technology has made to a great degree superfluous, and which has to be added to one's lifestyle simply for the purpose of wellness.
It 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.