I had to Google the show. I mean...these seem like nice, normal clothes to me. If you went to Nashville, you would see more cosmopolitan dress, but also stuff like this.
The U.S. can be so much about wearing what you want, no matter what city you are in. Nice or not, trendy or not. If this is just a small city in TN, then what she is wearing is probably NICER than what a lot of people are wearing in the suburbs.
TV sitcoms are not a good place to go to understand American dress--they are more fantasy than anything. I would LOVE to open my closet and find a bunch of clothes from any sitcom character. They are just better. Sitcoms will also dress people strategically to appeal to the widest audience--making a woman seem country but also like the leader of a company.
Often TV stylists are ahead of the game. I see a lot of aughts patterns and colors--maybe we will be wearing this in a year. Also reminds me of QVC--I adore looking at clothes like this on QVC.