Ha! I worked for Headway at the time it was all go to close homes for the people you describe, Muttley. I lived in Staffordshire at the time and we had a vast complex called Stallington - huge gardens where the - what are we allowed to call them now, mentally 'challenged'? - residents were free to roam at will, to take part in gardening and to grow their own veggies. They had a fabulous spa which helped those with added mobility problems, you name it, the place had it. They had regular escorted outings and they may have not been in the community but were considered very much a part of it.
What happened? The decision was taken to close this place down and bung the residents, some of whom had been in it for decades, into small houses throughout local towns. Mencap (now SANE) lobbied very hard against this, having a good idea of what would come next. Which it did - people formed small bands and protested outside the individual homes with placards saying things like NO PSYCHOS NEXT TO MY KIDS, etc. The poor ex-home residents were shouted at and there were attempts to vandalise the houses they lived in. They weren't welcome in the communities at all. So long as they remained in their purpose-built estate, part of the community but not living right alongside non "challenging" residents, all was well.
The other issue was cost: there had to be a 24/7 assistant living in each house, meaning that there had to be two (one on days, one coming in for nights), and sometimes there'd only be two, three or four people to care for. The costs went through the roof in farming out some 300 people into a variety of small houses, many now far away from Stallington and with tiny or inadequate gardens and certainly the special amenities (previously in full employment, in-house) would only now visit - chiropodist, hairdresser, physio, etc., all charging more because of the wider geography they had to travel to service the same clientele.
They weren't living a more independent life at all - they all still had to be supervised 24/7 and there was far more of a problem with them getting out and roaming into towns where they got picked up by the police or set upon by pea-brained youths. Mencap was certain that "independence" was a dangerous myth promoted by well-meaning do-gooders who had little idea of the reality of dealing with people who needed a strong structure of friendships around them (these were often summarily broken up in the fragmentation of housing), routine, and should not be given the illusion that they could function "in the way they want to live".
It cost, at the time these actions were taken, about three times as much to house these often very difficult people in communities, due to the need to hire more staff than was previously necessary and to pay for services to be performed contractually, where once they were done in-house. Pleasures lost to the residents were the large gardens, the spa facility, the swimming pool, and the contact with staff such as the nurses, physio, etc. And obviously, instead of one large structure to maintain, there were now dozens of different houses to maintain through contracts, leading to the appointment of administrators to handle these (and thus more cost in salaries).
It seemed to be a cruel exercise. Why not have let those already in places like Stallington live out their days there, but gradually introduce open living to newbies who'd know no different? I'm sure everyone thinks that living in an open community is the best thing for all of society, but sometimes, as the murders of members of the public by people off their meds (their decision, to live as they want to live, etc.) or away from supervision and secure living places have shown, this is not a one-size-fits-all solution.