mental illnesses are created by men (with very questionable motives) as no physical test can say with 100% certainty what mental illness you have.
Check the medical diagnoses for which there is no certainty, no objective test, and comes to down to a combination of clinical judgement and diagnosis by exclusion/elimination. It's quite considerable (i.e. its actually MOST non-psychiatric medical conditions). e.g. narcolepsy has a misdiagnosis rate (false positive and negative), there is NO definitive diagnostic test.
the doctor at the psych ward didnt even observe me directly (or at least not for more than 5 minutes) before he diagnosed me. and then some really cool guy got a shot in the ass when he didnt even try to hurt anyone... he was just going on manically about lincoln and bi polar disorder which and it was really kind of funny. he told me that the psychiatric ward was just trying to make money off of me and i agree with him.
Your complaint is universal (in the USA), nothing limited to psychiatry. Everyone is complaining that doctors aren't spending enough time with patients, aren't listening enough. Doctors are complaining about it. Money helps. If you can afford one of those nice private doctors, or have exceptionally good insurance, they will spend lots of time listening, take a comprehensive history, order appropriate tests, etc.
Mental illness (and its attended harms, dysfunctions) has been observed and documented for centuries before the rise of modern pharmaceutical companies, actually since antiquity. e.g. Hippocrates commented on severe depression and other illnesses. Nebuchadnezzar II was said to have gone insane for seven years, completely withdrew from society and lived in the forest in what was described as an animal-like state (note: a fragment from the Dead Sea Scrolls says it was Nabonidus who was afflicted with madness for seven years).
Goodness forbid anyone attempt to describe these (and other) conditions, try to understand their origins, as well as develop treatments for them.