They have professional softball. There just isn't much demand. You really can't create a league and tell people watch it. There has to be a demand and then league recognition.
When I was a kid, I got to be a batboy for the Prescott Thunderbirds, who were in a regional (AZ-CA-NM-NV-UT) women's pro league. I had the hots for their second baseman, Cheryl Rosser, for years... Games every thursday night at Ken Lindley Field...my Dad was usually on the mic, and it was the only night during the week that I wasn't trying to hustle quarters (or free concession stand goodies, after they got tired of paying us cash) by shagging foul balls that left the park.
Good times...