Tim Walz is riding high on some stolen valor. By that, I don’t mean to refer to the false or otherwise deliberately misleading statements the Democratic vice presidential candidate made about his war record (or lack thereof) over the years. Rather, I’m referring to the unearned enthusiasm he’s receiving from housing activists, lawmakers, and the media who somehow have concluded that Walz is a sterling champion of YIMBY (yes in my backyard) zoning reforms. Business Insider called him a “YIMBY” in a recent headline. California Sen. Scott Wiener (D–San Francisco), a prolific author of state-level…