It's actually not. I'm as yimby as they get but you need to understand that the value of people's property has almost nothing to do with nimbyism. They want things to stay the same, they want their "neighborhood character". Listen to them when they say this, it's not a sleight of hand. If more dense housing was built in their area the value of their house would go up even further than without it, but the point is they don't want to live near more people!