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I would like to say that the exact same practice is used in the USA. It’s so easy to dispose of folks who are vocal in this manner. No one will contend the “opinion” of a psychiatrist.
I have certainly seen plenty of false accusations in my day. The accused has no recourse, especially if psychiatry deems the person “incompetent” or “lacking insight,” as they put it. This determination can be made with no evidence whatsoever. It’s an easy way to dispose of folks that are challenging the status quo.
This is a human rights issue. This is one reason why I made the decision to leave the USA.