The last decade has seen a particularly significant increase in depression in the United States, with prevalence rates increasing by 33% between 2013 and 2016, with the largest increase among youth and young adults
Back in the day we used to try to address depression with various talk therapies and group therapies. This wasn't perfect and was also relatively expensive but at least it offered a sense of connection and tried to tie people back into society.
Now it's all about pills, which are a huge money-spinner and are cheaper than talk therapy. When things make money you tend to see an increase in them.