But urbanists do live in cities? San Francisco proper is, like, the origin of the YIMBY movement. Searching for "baltimore yimby" on Google brings up a lot of advocacy, like this: https://www.thebaltimorebanner.com/community/housing/baltimo...
There’s a big urbanist movement in the DC area, but it’s focused on trying to upzone Northern VA and Montgomery County, MD. Meanwhile, most of the Maryland side of the Metro network is underutilized. Urbanists would rather pay triple to try and turn Tysons Corner, VA into an urban area.