Absolutely! Just imagine the benefit, if the cost of shelter had as much progress as say clothing which is so cheap now, relative to 200 years ago.
Also, i think people are so levered up on their homes, they have ever more incentive to keep the ponsi scheme going. Where i live people sometimes but down payments as little as 20% or sometimes even 10%!
So, to answer the original question. if you have a down payment of 10%, say your entire networth, and the market drop 20%, it means you have 200% of networth lost!