There are NIMBYs elsewhere in this comment tree telling me that evil rich developers lobby to have zoning relaxed so they can destroy the city with their horrible high-rises. So which is it? Which class of evil rich person controls everything?

Or is it possible that the YIMBY progressives who actually watch this issue in their local communities are right, and the biggest problem is NIMBYs vetoing everything to protect their "neighborhood character" and "the environment"?

NIMBYs hold a lot of power in local governments. They may be almost the only ones to turn out in many local elections and referendums.