I would say the housing bubble was driven by supply and demand, just not traditional home-buying supply and demand. Houses were being treated as day-to-day commodities, which is bad for people who wish to actually live in houses and not make money off of them.
I was in Vegas during the start of the housing bubble and all I saw were investors buying houses to flip immediately for big profit selling to other investors who thought the same. Anyone who actually wanted to buy a house to live in was required to get caught up in a risky mortgage option that left many of them in serious problems when their house was suddenly worth less than half of what they owed on it.
We looked at a house at the start of the decline and offered $50,000 less than asking. They laughed at us and we stopped bothering to look. Less than a year later the same house was for sale for more than $100,000 less than our offer. The realtor who showed us houses later moved out-of-state so she could earn a living.
Someone I knew told me about his friend that bought a house, did bare updates to it, and sold it within a month for nearly a $100,000 profit. He was gleeful at the idea you could do such a thing. I told him that was good for his friend but incredibly bad for everyone else in the city. About a year or so later I was shown to be correct beyond my worst doomsday predictions.
I'm seeing the same things I saw in Vegas starting again.