This is all a moot point.
There are not laws or restrictions against women playing in professional sports. The truth is just that there are not any women out there who could possibly hope to compete with men at that high of a level. I'm talking about "real" sports (this will probably start arguments lol), not golf, racecar driving, table tennis etc. The only exception that comes to mind is Billie Jean King in tennis. But today the gap has widened considerably between men and women with the onset of steroids and other supplements.
Is it not fair that women don't then have their own leagues? I think it's perfectly fair. Sports are a business just like any other business, and the product they sell has to be a good one. Women are, from that perspective, not as good of a product, so a lot of times there is no market for professional women leagues.
