Existing property capital owners have a vested interest in not building more housing. Building more housing will negatively impact their profits. Existing property capital owners also have far more power than the petty bourgeoise investors seeking to "build more." This conflict of "NIMBYs vs YIMBYs" exemplifies a core contradiction of capitalism that Karl Marx articulated 150 years ago, except "NIMBYs" are not individual homeowners; they are rather the idols of the petty bourgeoise "YIMBYs." See: contradiction.
Objectively, the working class has no place in this conflict and will not profit from building more housing. Of course we should build more and better housing for working people, but that is not what the petty bourgeoise investors actually want; they want to build more housing for profit. Big difference.