You may not know that the WNBA finals begin this weekend. It's probably fair to say that if it were the NBA you would know.
More people pay attention to men's sports than women's sports, and one reason for that is inertia. Women are pretty new to big-time sports — and perhaps the media hasn't caught up with them.
Also, there aren't that many women's team sports. Lots of people tune in to watch Serena Williams play tennis, and this summer, swimmer Katie Ledecky got a lot of attention — but they play individual sports.