Reframe the question in terms of what it really is: Is forced treatment for the mentally ill more humane or less humane than letting them "do their thing?" Is it more humane for the people who are forced to interact with them?
A lot of ethical questions could use a "trolley-fy" process in which the status quo is simply presented as another track, and then another process by which that question is re-embedded within its actual context -- the mentally ill are not off wandering some other plane of existence, they may be screaming in your alley, tonight, around three a.m.
A lot of ethical questions could use a "trolley-fy" process in which the status quo is simply presented as another track, and then another process by which that question is re-embedded within its actual context -- the mentally ill are not off wandering some other plane of existence, they may be screaming in your alley, tonight, around three a.m.