If planning your vacation consisted of driving 75-150 miles will result in your easily saving hundreds of dollars (even with today's gasoline prices) as opposed to flying into the hub of the legacy carrier, wouldn't you avoid the monopolies which the hub-and-spoke airlines have, and the nosebleed-inducing skyhigh airfares that go with them?
Of course you would!!!
I'll gladly avoid all of those airports if it means saving hundreds of dollars on my airfare to visit most regions of the country, and so would anybody else who loves to travel see the country without having to put up with those sky-high airfares.
No, not everyone would.
Just to give you a clue. I got a DL fare to BWI for $158 out of Atlanta. SW was HIGHER and I have to drive 2.5 hours. SW's airfares are NOT the deal they used to be (once again over on Flyertalk.com there are whole threads detailing instances where SW is higher) SW does have the DING specials, but lots of folks don't have the flexiblity those require.
Do you work for Southwest?