My mother is sometimes severely depressed and if she hadn't been forced to stay in the mental hospital during those times, perhaps she wouldn't still be alive. Both she and I are quite happy about that, and agree that the forced hospitalisation was a good thing.
However, with the attitude of some of the nurses there (goal for some is to have quiet patients, not to help them), and the potential for abuse by people who want someone out of the way, forcing people to stay in mental hospitals is a really scary thing. There is no defined limit on how long someone will stay, and you completely depend on the people working there to give you back your freedom. Furthermore the people who are supposed to help you are biased against you because hey, you're mentally ill and therefore your opinion is invalid and your testimonies false.
So it's both a good thing and very scary because of the (potential) abuse.