You aren't thinking through enough to even acknowledge the commonly understood facts. Mental illness can and usually is caused by something physical- head injury, toxic metals, ect....
When your mind has been compromised for whatever reason it is a frustrating condition. If you ever had experienced what I am talking about you'd understand.
Some disorders can be caused by genetic or environmental factors too, the drug development process for mental disorders is very concerning though, it's basically a scattershot approach
The brain is by far the most complex organ, it's a shame that so many doctors act like they're all the same. Antidepressants might be great for a % of people but they're not a bandaid
Sorry for what you went through. I have cousins who were forcefully medicated for ADHD, it's disgusting how willing some people are to dope up kids, just to make life a little easier