My example involves many people being forced to sell. That wasn’t the parent’s argument or at least I didn’t understand it this way. I think it made a point about voluntary sale. Otherwise they wouldn’t have said that vast majority of homeowners would be unaffected. I’m saying involuntary sales are a significant effect of housing market crashes. In fact involuntary sales might be required to have a market crash in the first place. If that’s true, a significant number of homeowners must be affected in order for a crash to occur.