I have all to much experience of depression, from all sides of the issue. A Paranoid Manic Depressive mother, borderline depression for myself at times and diagnosed depression for my wife prior to us meeting and during our first few years together after undealt with greif.
Depression, in its many different varieties, is a real thing. It is a terrible strain on the individual and their families. It can be overcome with proper concelling, support and perhaps medication.
However, it can also be a crutch.
I saw mine coming, I'd seen it in my mother in years, I knew the signs.. I was able to head it off by actively going out and seeking a better life.
My wife's was a direct result of her father passing away when she was young. Once we got her into councilling, and with me to support her, she has for the most part overcome it.
To this day we suffer from time to time, when life gets us down, when work is hard and people are mean.. but we go on, supporting each other and refusing to let it hurt us the way it once did.
My mother however uses it as a crutch. Heavily medicated for as long as I have known her, she uses her condition to avoid anything even remotely difficult or challanging, to forgive whatever hurt she may cause others and to blame my father for things entirely outside his control. She doesn't want to get better, because it takes effort to do so and forces us to face things we'd rather not.
Depression is massively over diagnosed. It seems these days you can be diagnosed with depression just for having a bad day or being upset about things it is reasonable to be upset about. It is also overmedicated.. even when real, medication cannot.. and should not.. be the only answer. Medication is there to support the recovery via other methods not to simply numb the pain forever.