Sick, but like… are we?

What if depression isn’t a mental illness, what if it’s just the normal response to this fucked up life? I feel like everyone who isn’t depressed is just in denial. If you aren’t having to medicate to force yourself into pretending that you’re happy here, how? What thoughts and experiences are you having that are leading you to the conclusion that it’s good here? Like why are we calling depression an “illness”? Is it? Is it really that sick of me to see all the horrible shit that happens here and think “man, I’d rather not be here”? Don’t get me wrong, I’m not saying I’m happier for living or seeing it that way, I’m just confused as to why it makes me the sick one.