I think we starting running off topic awhile ago, and the OP hasn't even commented since about the second page. I'm not really sure what we are discussing (arguing about?) anymore, but what its worth let me put in my $.02.
Admittedly, modern psychology is still a new science and we don't know everything about the human mind/body yet. But we have made significant progress in the last hundred years. There are many different forms of treatment for mental illness, many of which do not include medication. Every person is different so there is no need to generalize what everyone should do or should be able to do when they have some form of mental illness. There are some people that
need medication and some that do not. This has nothing to do with laziness or willpower. People's minds are just as unique as their individual bodies.
For example, you have a group of people and give them all identical cuts on their fingers.
Person A might be able to stop bleeding really fast and not need a band-aid. A few days later the cut is completely healed.
Person B's body might not be able to clot the blood quite as fast and B needs a band-aid.
Person C might take longer to recover and when it does there is a darker scar then in both A and B.
Person D might be get an inflection and need to take antibiotics.
Person E might have hemophilia and needs to be taken to the hospital immediately.

This is a very simple and small example of how people can differ just something as small as a cut on the finger. Imagine if other factors such as age, diet or the environment were also added. You can have a hundred people and all of them could react differently from the exact same cut.
So, back to my main point... The human mind is just as complicated as the human body. This is why everyone's personal experience can be different (as you can see from this thread, and we are a relatively small group). Yes, it is possible for one person to recover from depression without ever seeking professional help. But someone else who is also suffering from depression might
need to see a doctor and take medication. They are not "weak" or "lazy," they are just different.