No -- you're reading way too much into the comment. He was saying that the authorities can't make her get psychiatric help unless she is a ward of the courts. That's been the legal standard for a couple of hundred years or so.
You are absolutely correct. Unless someone is under the control of the courts, I don't think they would have any authority or right to get someone or force someone to get psychiatric help. If I wanted help for my loony aunt I would not go to the DA's office.
Don't tell em that they much prefer the paranoid loon version of reality.