If you look around at this world and you're not happy, congrats, you're not a zombie.
People are super obsessed with being happy. Gotta be happy, gotta be healthy, gotta smile all the time, gotta have social activities. Oh no! I might be unhappy, better get that checked out!
But, Im not trying to say clinical depression isn't a real thing. It is, and it's serious like any other medical condition.