I agree with the general idea you're putting out but I think the issues with psychiatry are more complicated than you're making it out to be. There is definitely a lot of over-prescription of medications to people who don't need them. Normal life problems are being re-branded as anxiety or depression to sell pills. You can numb yourself with medication temporarily but your actual problems aren't being solved. Hence customers are stuck in the mental health industry for years and years, never really resolving the issues that brought them there, becoming dependent on drugs that often times have serious side effects.

But to say that psychiatry doesn't work at all isn't accurate. Especially when someone has a severe mental illness like bipolar disorder or schizophrenia, medicine can be effective and even necessary. Other people might benefit from taking medication in the short term when their at a point of crisis in their life and need temporary relief. 

I don't think psychiatrists are meant to 'cure' anyone because they can't solve anyone else's life problems for them. But ideally a psychiatrist would provide support for people who are suffering with therapy and potentially medication if they need it. There are a lot of people who have been helped by psychiatry in that way, although I think that too many people have been hurt by it as well.