Because there's enough confusion for elementry school people that there's a Washington State and Washington DC. Now make it Washington SC so they'd confuse Washington State, Washigton SC, and SC (south Carolina)
I don't have much of an issue with this. When the constitution was created I don't believe it was ever invisioned that there'd be more people living within the capital then you have in some states.
A possible solution instead though would be to perhaps split DC Down the middle, with the northern portion having their votes and population tallied for Maryland and the bottom half for Virginia, thus allowing them a chance to vote for representation?
Don't know if that'd work, was just a sudden brain storm.
But I am strangely not too up in arms over this as I do think this is the type of situation amendments were created for; things that the founders couldn't forsee but have came to pass. I think I'd support a consitutional amendment to allow this.