Why is depression not treated like other medical conditions?

Because it's a hidden illness, and those who don't have it just tell those who do to "get over it.". Just like anxiety(Which I have... severely), people say "oh get over it, you'll be fine." When these hidden illnesses literally change your brain and body. There are MRI's on someone with and without depression, and they are very different. Depression is a real issue, freakin Robin Williams killed himself over it, but did anybody know? No, because it's a hidden illness that nobody has sympathy for. Sorry for that little rant, but it really erks me that people don't take depression seriously. People who don't have it say "Get over it", or "Suck it up." when it's not easy. I myself am not clinically depressed, but I've known people who were and I've felt depressed many times. It sucks. It takes everything to get out of bed in the morning for some people. It's ******* sad that nobody gives a **** about it, and that needs to change, but it never will because nobody in this world gives enough damns to do so. Again, mini rant, my bad.

a lot of mental health things aren't treated properly

depression sometimes gets a bad rep because it's not something you can "see" and it's hard to understand it fully if you've never had clinical depression. some other conditions, you can fully see that through their actions, something's wrong.

but with depression, it can manifest in a few different ways that may seem "normal" to people who aren't accustomed to this person.

& a lot of people self-diagnose, which is not a good idea.

edit: actually, i think the best way to put why is people with depression are often to just "BE HAPPY" or "DO SOMETHING THAT MAKES THEM HAPPY"

when if you have depression, you know that's not the case. it's an actual chemical imbalance in the brain.

Because it's not well understood

It is.