I see it a bit like this.
Mark grows up in an affluent family, living in a big house. Mark and his family have a disagreement and it becomes difficult for Mark to live there any more. One solution is for the whole family to discuss things openly and come to some kind of compromise that everyone can live with. Neither Mark nor his family will put in the work to achieve this, so Mark moves out. He now needs somewhere else to live.
He could work hard and earn the money to pay for a place of his own where he can live the way he wants, with other like-minded people. Other people in his position have done that in the past.
But there's an easier solution. His neighbour Sarah has a house. A bit small, and Mark is vaguely aware that Sarah has some difficulties, the details of which elude him. Probably a lot of fuss about nothing, and ultimately Sarah's fault for not being from Mark's side of the tracks. Mark's view is that Sarah is morally obliged to take him in. He's had a hard time and Sarah seems a very polite and helpful person. She won't make the fuss that his family have been making. She will just budge up and let him share her hard-won space. She will probably be pleased to be of use.
So without even bothering to ask Sarah, Mark moves in and takes over the space. And soon it's Mark's space, not Sarah's, and everybody is saying how marvellously brave Mark has been to cope with this adversity. If Sarah tries to raise any objection, she gets shouted down. Why can't she see how lucky she is to have this fabulous new person in her house! He really makes a much better job of being there than she ever did. He must be so upset by her behaviour. If he kills himself, it will all be at Sarah's door!
All of which suits Mark's family just fine. They carry on exactly as they always did. Nobody blames them, nobody expects them to change anything they do. They can join in the abuse of Sarah too! Win win win.