Many people wish to live in nice places-hence the traffic. I have been in Cape Coral (many times)-yea there is traffic but there are many places far worse.
Most of the traffic in Northern Virginia is the result of things like building 300-home subdivisions with a single entrance/exit off a 2-lane road. The anti-growth folks have found that they can stop new roads, but they can't stop new development. The end result is what we have here.