This is the question posed by Mark Kreidler on ESPN.com. I can answer that question.
Because NOBODY CARES.
These leagues are started when there's no actual market to support them. And when they fail miserably, or start to shed viewers in droves, ESPN and all the rest start wringing their hands and wondering how? Brandi Chastain took her shirt off, for God's sake! How could it fail! Because NOBODY CARES.