I used to say something to this effect about homelessness. That part of why we have a housing shortage and other countries do not is because we have made certain types of housing illegal and thus made the "bottom end" housing too expensive for some.

Things like shanty towns etc.

Now, I'm not advocating for a society that houses people in shanty towns as an end goal. But I am advocating that shantytown might be an upgrade for some and we need to help people upgrade.