This is only half the truth. The reality is that demand is propped up by fannie/freddie and mortgages in general. The fact that the government will buy investment property mortgages is bonkers. In reality, you should only be allowed to mortgage the raw materials and labor of a primary home, everything else is just leveraged speculation. There's also a immigration question, but should be purely solved using new supply. Finally there's a question of, should you even be allowed to own investment properties in cities. A real land reform would be huge for the country; ie. forcing landlords to sell investment properties in any area where rent exceeds $x.

It’s a supply-side problem, but with majority of people being either indifferent to the problem or against downward pressure on the housing prices (most people don’t rent). The prices have skyrocketed, and most people who bought in the last 5 years wouldn’t want their assets to depreciate, if they spent 500K+ on it.