Presumably because they couldn’t cope with her needs/demands? If that was the reason they refused to take her back, it’s understandable. When I first read the article, I thought it was someone I know who also has a personality disorder and uses a wheelchair (although doesn’t need one).
You can’t help people who refuse to be helped. I find it very hard to deal with the person I know. If this woman is similar, then I don’t think anywhere they found for her would have been acceptable.
Saying that isn’t saying that all people with personality disorders are like that, but sadly some have extreme problems and it’s not at all clear how to best support them.