Locally, quite often people who just want to preserve the status quo of their neighborhoods - perhaps understandably! - invoke the language of social justice and concerns about affordable housing. Then they demand that new development, unlike their properties, have off street parking. Parking, even just the cost of the land, is expensive. These goals are at odds with each other. Increase the required parking and you increase the cost of units.
I think parking minimums are bad policy in urban areas for a variety of reasons, but even if people think parking is necessary they should get that it inevitably makes housing less affordable.