No they shouldn't be treated against their will, as long as they are no danger to themselves or others, it should be their choice. They may be happy to deal with whatever instability they have.
Let's say for example we have someone who's a musically genius, and suffer from extreme social phobia, in public this person feels judged, like they're going to be sick at any moment, doesn't deal well with others, etc. Yet, this same person find a beauty in music the you can't understand, would it be fare to take that away from that person, if they felt it was worth it?