No, they really don't.
Someone's schizophrenia doesn't magically vanish if you get your own two-bedroom apartment, nor does your heroin addiction magically vanish if you get a fancy studio apartment with the nicest view. It's outright insulting to every single person who ever struggled with mental illness or drug addiction to even suggest that real estate is a magical cure to problems.
From where I'm standing, this looks an awful lot like correlation being passed off as causality. You see happy families in the suburbs, with their nice house and nice life, and then you see people struggling with mental health and drug addiction, and all you see is that one's have a house while others don't. Well, guess what needs to be in place in your life before you can even be in a position to buy a house.
I take it you haven't been to Afghanistan.