I'll have to make an edit. My phrasing of the topic made it seem as though they were ignoring that, but the actual article says things like,
"...[W]e delineate the evidence for 10 other putative factors for which the evidence is also circumstantial but in many cases, at least equally compelling. We conclude that undue attention has been devoted to reduced physical activity and food marketing practices as postulated causes for the epidemic, yielding neglect of other plausible mechanisms."
"Cheap food" is not even on the list of causes of obesity?
I'll have to make an edit. My phrasing of the topic made it seem as though they were ignoring that, but the actual article says things like,
"...[W]e delineate the evidence for 10 other putative factors for which the evidence is also circumstantial but in many cases, at least equally compelling. We conclude that undue attention has been devoted to reduced physical activity and food marketing practices as postulated causes for the epidemic, yielding neglect of other plausible mechanisms."