Helen49, not so much the mindset of the passengers, but the mindset of the airlines. It's the airlines who decide where to launch flights.
The airlines serve a market, a quantifiable set of passenger behaviours. The other issue is critical mass, it is often cheaper to add flights to an exisiting base than open another outstation, this is particularly true when there is an assumption you can get the market to come to you, rather than pay to go to it. Very true with regional airports with nearby competition.
DSA was the answer to a question no one was asking sadly.