I can guarantee you there are more people watching Raptors games than Wizards games. Every Raptor game is televised across Canada. If Toronto has better attendance, who cares if the watching public is in the hometown of the franchise or spread across 6000km? I could be wrong, but I would think television viewership of one sh!t franchise in a city with around 600,000 people would be much less than the viewership of another sh!t franchise in a country with 32,000,000 - with the population size being over 53 times as large and basketball being a very popular sport in Canada - albeit not as popular as hockey, not even close - I think the Raps can do better than DC, much better in fact, in TV viewership. Even if DC has 4 times as many basketball watching fans per capita than Toronto, they still have the same number of viewers in their home cities.
If players want to be seen by as many people as they possibly can, then the Raptors are the place to come - unless one American viewer is equal to twenty Canadians or something else I am not aware of.
With all that said, your argument is based soley on the premise that players don't want to play here and people do not want to watch basketball. One of those statements are true - players don't want to play here.
If the Raptors are able to win and have an exciting product (getting high picks in sh!t drafts don't help either), then players will not hesitate to come here. The US recognition and televised games on TNT, ABC or whatever national television station in the States will come - it did before with VC and it will again in time if the Raptors become a winning and exciting product. Keep in mind OKC has been 3 years in the making (4 if you count SEA) and they are only late last year and this year getting the recognition.
http://www.nba.com/wizards/media/wiz10-11schedule-a.pdf
2 games on TNT, 0 on ESPN, 5 on NBAtv.
The first TNT game was John Wall's first as a pro being #1 pick on October 28.
I believe I recall the 2nd at end of November actually being cancelled because they sucked but I could be very wrong there.
The Wizards, much like Toronto, SAC, MIN, etc, will get the national US attention when they have something to show.