I think it must be the risks they are presenting with, as a symptom of their mental illness.
The other alternative is them being informal but not allowed off the ward, if they have had a Best Interest assessment carried out. This is quite common in patients who have dementia or a learning disability, who lack the capacity to remain informal, don't have a florid mental health illness so can't be detained, but also are too risky to just discharge to a bed and breakfast. So that could cover, for instance, the use of baffle locks in an elderly care unit, or only letting som Leone out with a nurse escort. This would be the least restrictive option, to keep them safe. Obviiusl y this is understandable. My nan had dementia and was a "wanderer" but would just get lo st. The first home she was in had an open door policy but she wandered off a couple of times and had to be brought back by police. The second home she was in had baffle locks. This was before Best Interests Assessors but would have met the remit for being in her Best Interests. We were certainly happier knowing she was more secure.
I do think the provision out there is a shambles. I trained in one of the old asylums and yes they weren't perfect. When they were closing down, at least there was more supported housing and hostels put in place. Now there's very little, and tbh as councils and BHS trusts don't really run them any more, many are run for profit, with the exceptions of y hose run by voluntary organisations or Housing Associations. Over lockdown, I was going into patients homes to administer depots. Some of them were lucky, had nice flats and supportive family close by, but many were living in squalid conditions, in flats that were either bare and dirty or cluttered and dirty. When I asked how they were managing lockdown, the majority said 'Don't bother me, I never go out.' And there's nothing for them. Fay hospitals/centres shut down, no drop in centres, no work based environments, nothing. All the contact they had was a fortnightly visit from a nurse for their injection. And often, if they stopped engaging they were closed, when imo they're the ones who should stay open as they're the most vulnerable to exploitation.
Care in the community was mis sold as some kind of utopia, but it's not. It stinks. I don't know why I'm still in mental health nursing, i went jjn to help people but it's so demoralising.