Earlier quoted context omitted.
What if most of the people you wish were interred there are competent enough to decide they don't want to be there but not competent enough to meaningfully integrate with society. This can even be true of some who definitely not competent now but would become sufficiently lucid to disinter themselves before discontinuing medication and resuming drinking and drugging.
".. competent enough to decide they don't want to be there but not competent enough to meaningfully integrate with society..." At some level these should be mutually exclusive conditions; one (unable to integrate) is the major fact that disproves the other (competent enough for self-determination). "but would become sufficiently lucid to disinter themselves before discontinuing medication and resuming drinking and dr…
Except that just isn't even remotely anything like true. Every adult is presumed competent until a court has declared the converse and merely mental illness is not by itself sufficient to provide this.
https://www.law.cornell.edu/wex/mental_competence
It has a legal meaning that isn't malleable to meet what you think ought to be true. Merely being a loser who wants to live in a tent and do meth doesn't make one legally incompetent and in fact any attempt to patch that bug with law alone will probably run into constitutional challenges