I don't think this is actually true. If you spend enough time on Nextdoor and read what nimby's complain about, the chief concerns are traffic, parking, and congestion (after crime and safety). Obviously, there are nimby's who are concerned with their property values, but the average 75 year old nimby isn't interested in selling/moving their property.
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".