Really? I read complaints about the mortgage interest deduction all the time. I mean, subsidizing home ownership isn't exactly an obviously worthy goal in and of itself and it creates weird incentives.

The difference in popular discourse is threefold: the mortgage interest deduction is less of a blue/red team tribal marker; it isn't as morally charged an issue (the arguments against it are more economic in nature than moralistic); a disproportionate number of the people who would be complaining about it are homeowners themselves and therefore heavily incentivized to keep it around, regardless of its economic effect.