Sure I would like to visit, there are lots of interesting place, but having to deal with the TSA is to much of a hassle on its own.
Government shut-down closing those interesting places once in a while is just the bonus argument, but can prove even more bothersome than the TSA (which is after all only a bad moment).
I use night train, when available, 1/2H to the train station, 5mn to boaard, and I wake up the following day in a nice city to explore. (not an hour away from that city, but in the center).
Only in 3rd world countries like the US and some of the worst parts of Africa and Asia you have to wait over 1hr in the line on average, and it's better to avoid the worst airports, like Detroit, Chicago, Minneapolis, Atlanta or Newark at all to fly in from abroad. Paris CDG (de Gaulle), Heathrow, Rome and Istanbul are the worst in Europe and you still cannot compare it to any airport in the US when flying in.