Sorry, don't follow.
What exactly is the point?
For decades among the MLB brass, the reluctance to putting baseball in DC was rooted in the perception that DC was a one-team town. Most cities have a tendency to see the support for various sports teams - in terms of attendance, merchandise purchase, and general public interest - rise and fall with the success of the respective teams. DC is really no different in that regard. So the rap on the city regarding not being a good baseball town or a good basketball town or a good hockey town or any other kind of sport town, is rather arbitrary in many ways. If the teams win, they "get the attendance they deserve" as Kasten puts it. It isn't really different than other places. It's just that other than the Bullets of the late 70s and the Caps' recent rise, the other teams in DC haven't been very good. In fact, they have mostly universally sucked.
The Skins, being the only game in town for so long, have multiple generations of fans built up, win or lose. And with the NFL being an easy thing to market and sell, the Skins reign supreme. Consequently, the perception of DC as a sports town over the last 20 to 30 years has been less based on whether or not it would support a baseball team and more about whether it would support any team other than the Redskins. Obviously, the answer is that if the team is a quality product it will get support - that has been demonstrated across all the other sports. But despite that being the general case for any city, DC's local-media-stoked obsession with Redskins coverage had MLB folks wondering for years whether any other sport could really crack that market; so there was resistance. It took some high-powered lobbying, a vision of a revitalized riverfront, and a sweetheart deal that had the rest of the owners seeing big dollar signs they wouldn't be getting anywhere else for the resale of a gutted club to make them consider finally putting a team here.
So the questions about DC as a baseball town are not really about whether or not it can attract a following. DC has plenty of hometown and long and short-time transplanted baseball fans to draw from. And this horrible joke of a team often draws more people and has as much, if not more, neighborhood buzz than several other teams around the league. It's really about whether baseball would be stuck playing a very distant second fiddle to the Redskins machine or be able to crack the market the way it does in other cities. Due to the Redskins stranglehold on the local media, it takes some work to counter that. It can be done, but it takes some initiative that a lazy ownership and poor communications staff may not be able to deliver.