[vacri]

> If you meet with a psychiatrist, you have a disorder. Period.

Whether or not that's true, it's irrelevant to the statement about providing valid knowledge. If a person goes to a family doctor, they have a health issue. If a person goes to a lawyer, they have a legal issue. To an accountant, they have a fiscal issue. Merely 'going to [professional]' does not mean that they have invalid knowledge.

> Whether a person is a danger to society or not, should be determined by a court jury based on his previous actions.

Not only is this is a huge waste of time and money (court officials, jury, legal teams...), but it's even more subjective that the system you want it to replace. And it's already well-known that courts deal with mentally ill people far worse than mental health services do.