You're missing the fundamental problem: no one can afford their houses. And they all know it.
Not only that, but the MID is really only useful to those who can afford their houses otherwise. Did you itemize? Did I? Do you know anyone who did? For everyone who is actually strapped by paying for their house, the MID is a fantasy. For everyone who is reallocating this that or the other in order to sustain their lifestyle, the MID is a factor.