This is too true.
More often than not, brain injuries can trigger chemical changes. My younger sister had two concussions (severe) within a year. She, like the majority of family, has struggled with depression.My entire side of my fathers mothers family has struggled with various mental illnesses (depression, bipolar, schizophrenia, addictions etc.) so we are very careful with what we do. However, in the past 6 years, we noticed a change with her. Slight changes like moodiness, lashing out, stuff you attribute to being a teenage girl. However, upon entry to highschool and her first concussion, we noticed it became more severe. Fast forward a few years, and she has her second and third concussion. She now struggles every day to get out of bed, and do anything. She tells me "what is the point of doing anything if nothing I do makes me happy?" or "There is nothing I can think of that makes me happy or even neutral. Everything makes me sad."
For her, the medications prescribed are to balance the chemical changes most likely brought on through the combination of concussions and family history (most changes according to my father came post-puberty). So, I do not think medications and shrinks are a farce, I think they are the exact opposite. I personally have battled bouts of depression, but found what works for me to get over them. A shrink is great, because it is nice for me personally to get things off my chest and let everything fall out. For my sister, she needs the medication side of it because its beyond an emotional level of depression. There is no cure all solutions for this disease, hence why everyone has their own methods of coping.
The biggest issue with this whole situation though is the stigma attached to depression. People either doubt you and ridicule you for it (as seen in this thread), or overreact to it and make it even worse.
Here is an interesting video
I'm a former racer, I say dumb things.