Not anymore. She's a woman worth about $6 billion dollars that is at the head of a banking, car dealership, and sports franchise empire.
And Tom Benson was a car salesman, Robert Craft made and sold newspapers and then razor blades, the Heinz family made and sold ketchup, etc. Even Jerry Jones was a Wildcatter. Lots of people have humble beginning. Doesn't mean they can't run a business.
It's not like any of these people run the day to day operations of their teams outside of Jerry Jones and none of them were "football people" when they bought the teams with the possible exception of Jerry Jones. Dennis Lauscha runs the sports franchise businesses and she has other people running the Benson car dealerships and Benson owned banks.