Should involuntary treatment be made illegal?

Should involuntary treatment be made illegal? Involuntary treatment is the administration of treatment (e.g. medicines into a human body or electroshocks) against the will of the human or at least without a consent, e.g. in the case of patients with mentally anomalous conditions such as psychosis (delusions, hallucinations).

Arguments for

 * Forced medication is a worse violation of human autonomy than imprisonment. Therefore, those subjected to involuntary medication are treated worse than actual criminals. That is unacceptable.
 * Expanding on the above, electroshocks are no better than forced substance intake. They were criticized by the American classic Zen and the Art of Motorcycle Maintenance by Robert Pirsig.

Arguments against

 * Those who are in the risk of harming themselves need medical help.
 * Not against their will; that is a violation of their human autonomy.
 * Each person has the right to take their own life since they alone are the rightful owners of their own life. A state that violates a bodily and mental autonomy of a person in the name of their protection engages in a grave act of despotism. See also Should suicide be legal?
 * Those who are in the risk of harming others need to be prevented from doing so.
 * True, but only by legitimate means, such as incanceration (limiting of freedom of movement). Violation of bodily autonomy and integrity and violation of mental autonomy and integrity is not a legitimate means.
 * One needs to distinguish involuntary mind-altering treatment (medication, electroshocks) from involuntary non-mind-altering treatment. Thus, if someone is brought into a hospital unconscious and needs treatment to save their life, that is also "involuntary treatment", but that is far from controversial. It follows that the heading "involuntary treatment" captures the controversial subject in a low-quality way.
 * Very good point.