[Buckeye McFrog]

More people are being diagnosed with mental illnesses than ever before. Multiple factors can be attributed to this rise;

My theory is that in earlier times a fully functional social structure (family, marriage, community, church) kept people with these issues from going completely off the rails.

Whereas today they have pretty much withdrawn from all of those things and spend all of their time on social media talking to other mentally ill people, all reinforcing each other, which creates an endless feedback loop.

[Grimmy]

My theory is that the more psychiatrists and therapists we churn out the more certified mentally ill are needed to keep those “professionals” paid.

[HangnJudge]

...spend all of their time on social media talking to other mentally ill people

It’s called the Hall of Mirrors
https://www.psychologytoday.com/us/blog/open-gently/201504/do-you-ever-feel-you-live-in-hall-mirrors

[suekas]

It is also a way to become a legal drug addict.