Earlier quoted context omitted.
The CPI includes rent (and owner's imputed rent). No one needs to purchase real estate. That's an investment, not a living expense. Millions of people have started families in rented homes.
You don't need to purchase a home - but historically - if you did - you've been much better off financially. It's the same as saying you don't NEED to go to college. No, you don't. You don't need much of anything... But if you did go to college - whether through correlation or causation - statistically you are much better off. So if college and housing get out of reach for most people - then maybe they will be worse…
it's not the purchase of the home that made you better off financially, but the ability to purchase a home.
If you had that ability, investing in another asset at the same leverage level (such as shares) would net you even more financial income (obviously, its higher risk).