[kmeisthax]

Lowering supply is an instrumental goal[0], not a final goal.

If you hate traffic, want more parking, or the like; the easiest way to do that is to just stop building housing, throw up your hands, and say the city's full.

But because doing that also makes your own property more valuable, both complaints are intermingled: people who want more money in their pocket can concern-troll about traffic to sound prosocial. In fact, this commingling has happened for so long that it is difficult to separate out the two concerns.

[0] AI ethicist jargon for "prerequisite you have to do to accomplish a lot of disparate or conflicting goals".

[hytdstd]

I don't really have any evidence for this, but I always imagined the nimby's who care most about property values would concern-troll about housing projects being "affordable", or their "environmental impact".