I few points, in no particular order.
1) I think the idea that depression is just feelings, is dangerous.
Somewhere on the order of 1 million people in the world commit suicide each year. Studies generally suggest that the majority of those that commit suicide were depressed. Even for those that do not commit suicide, severe depression can be entirely disruptive for one's job, family, overall life, and so forth, and if left untreated it can last years.
2) The idea that depression is in a different category than other medical issues seems entirely unscientific to me.
I don't think the idea that treating the brain and treating any other organ are in totally different classes is an idea that is viable in the 21st century. The brain is the most complex organ we have. Due to increased complexity, there are more things that can go biologically wrong with it than other organs. Various brain chemicals have been evidenced as being causal conditions for experiences like motivation, joy, contentment, so if they're totally disrupted in a brain then telling a person to work through it is no more helpful than telling a person to work through kidney failure.
Saying that there aren't states that may need some sort of medical intervention doesn't really make much sense in a medical context. The implication that the brain is the one area of the human body where biological causes never occur or are always fixable by "hard work" or "right thinking" is kind of looney in my view.
3) Medication can be important but I think it's important to identify the cause.
There are medications and treatments that are provided to patients of depression for the long-term due to evidence of correlation but not causation. In other words, there do exist prescriptions where it's not really understood how they should work or whether they do work. I think as a society it would be ideal to be more intentional with our use of medications.
I feel the same way about other medicines. I don't think the primary way of fixing high cholesterol or high blood pressure should usually be to provide medicine for it, especially on a permanent basis for the remainder of a person's life. Instead, I think the focus should usually be to improve exercise and dietary habits. The idea that so many tens of millions of people in the United States should be on constant medicine for high blood pressure or high cholesterol is strange to me. The focus always tends to be on treating symptoms rather than causes. For many ailments, lifestyle choices are the main cause. But, there are also real medical issues that no amount of hard work or lifestyle choices will fix, that were not caused by lifestyle choices, and they require medication, surgery, or some other treatment.
For depression, I think modern society in many ways imposes a lifestyle on people that is not conducive with their own instincts, so breaking out of it or finding ways to improve it are important. There are repetitive jobs, sedentary jobs, an overflow of stimuli and information, scientifically modified unhealthy food products, a detachment from nature, chemicals in homes and the environment, and other variables. Trying to fix the variables that can contribute to depression is an important thing to do, but it's also important not to rule out biological problems that can happen in the brain just like any other biological system.