[RobertRoberts]

>Might be true, but telling a depressed person to smile more or "it's just chemicals" won't help them.

Sure it will: https://www.medicalnewstoday.com/articles/248433.php

https://www.psychologytoday.com/blog/isnt-what-i-expected/20...

Google for more results...

Also, I agree that it's not simple, and that probably more than anything, these people need friends in their life that care about them, and let them know it.