I've internally thought of a similar metaphor. Previous generations didn't have to conscientious of food intake. Food options were more limited, there wasn't as much processed/calorie-dense food, work was more manual in nature and people likely walked greater distances. My dad who grew up during the Depression in the U.S. weighed 140 pounds in his '20s, but hit 280 in his '40s. That generation was kind of blindsided by the affect of this.

Likewise, my generation is dealing with an explosion of easy to consume streams of information and entertainment and we are kind of blindsided by that I have to conscientious of spending too much time consuming online information with Reddit being my biggest vice.