I don't disagree with much of your post and the part I take issue with I don't disagree with in factual basis. However, the fact is that we have a system that encourages home ownership and we also have a [government imposed] system that encourages banks to lend to more risky borrowers (I could expound this simple sentence but I don't think you need me to). People, for whatever reason, felt comfortable getting into mortgages without taking into account whether or not the could stay afloat if their industry went to crap, job was gone, relocation was forced, etc. For whatever reasons, people felt comfortable disregarding all financial risks associated with multi-hundreds of thousands of dollars in liability. That to me points to many other significant issues beyond a simple decision based upon rent vs. mortgage.
"I would rather claim to be an uneducated man than be mal-educated and claim to be otherwise." - Wookie 03:16