From School of Life,

Some of the ways that modern world we’ve built for ourselves and each other leads to so many of us struggling and becoming un-well.
It’s so prevalent that we had to invent a name to call how we struggle “mental illness” so we can talk about that and have more names to call each other instead of addressing the root cause.

It’s really not hard to understand why so many of us struggle in ways that sometimes get called “mental illness”.