But that "opportunity" is there because it's a secondary or tertiary choice for employers. Considering that 70%+ people are commuters, a) there are more desirable locations no matter where you're coming from, and b) there's no direct way to get there, other than Route 1, which is going to be a disaster.
No major highways or arteries, Metro goes through Arlington first, etc.
If you live in DC, you have to leave the city. If you live to the west, you'd prefer Dulles, Tysons, or Arlington. If you're to the south, it's Alexandria. To the north, Bethesda. To the west... probably Baltimore, or you have to drive all the way through DC.