Agreed - but that hasn't stopped so many other large corporations from being headquartered or at least having large presences in DC.
Edit: Not saying I think it should/will be DC (I dont think it should/will be).
Except the closest ACC school is UVA at 1.5 hours away w/o traffic and it is not a college football town AT ALL, but maybe those things are outweighed by your points and being close to Congress if they become more of a factor in college football.