Exactly, and likely the availability/affordability of nutritious food as well.
And to loop the analogy back – I don't think ubiquitous network reachability is ultimately a big problem; it's what we do with it: Social expectations around constant availability to respond, addictive/heavily gamified applications, etc.
"Personal failing" has idiomatic meaning, it specifically refers to things which are that person's fault. Medical issues generally don't count as "personal failings". If you did something wrong that caused a medical problem, that could be a personal failing. For instance if your organ failed because you drove your motorcycle too fast and crashed, that could be described as a personal failing.