You can leverage your money much better with a mortgage though. You just need a small down payment, but you get the upside (and downside) on the entire value of the home.
I'd also argue that most other assets are also highly inflated. The P/E on most tech stocks for instance looks a lot scarier than the overall real estate market. I'll add that people have been saying the Bay Area housing bubble will pop for over 30 years. It hasn't yet.