My wife is a Filipina player, and is a listed money winner on the AZ Player List. Despite being Filipina, she has the same problems every other female player has that lives in Georgia and Alabama, THERE IS NO LADIES TOUR HERE (sorry, did I yell?). (The SEAL Tour appears to be DEAD).
As for more lady players from the PI, all of the above comments are correct to an extent. The PI is a male dominated society, despite having a female president. Most of the pool tables are in bars (like here), and many of the young ladies that can afford a hobby like pool, would not venture into the establishments that have decent competition. Of course, some of the ladies do venture into bars, and in my experience, that is where you will find some of the better lady pool players in the PI.
My wife (by the way) learned to play from me, when she arrived in the U.S. four years ago. She is now the highest ranked player on her coed APA Team. I do believe the Filipino(a)s have a natural knack for the game. But the ones that really do well are the ones that love the game and work hard at it. Filipino(a)s are a hard working and proud people. They also have a strong and talented tradition in boxing and other sports. I look forward to seeing Filipinas playing pool at the international level, so I hope your observations are correct. Paalam!