We are seeing a rise in physical health problems due to increasing social isolation and other mental health risk factors.
As we replace the community barbeques with family grills we're losing more than a fun weekend activity, we're losing something that's evolved over hundreds of thousands of years to keep us mentally healthy. And more and more, scientists are learning that mental health is one of the greatest predictors (if not the greatest) of physical well being.
Why do you think ~50% of college students experience clinical depression? I'm sure that stress, poor diet, lack of sleep, and excessive alcohol consumption are all contributing factors, but at the end of the day these poor lifestyle "choices" aren't really choices at all; rather, they're triggered by specific design decisions made at the institutional and societal level.
Placebos aren't working better because people have more faith in medicine, they're working better because of the Hawthorne effect; people feel like they have someone who cares about them. That's why the effectiveness is radically different across populations, depending on the social environment, even though we're all exposed to the same media.